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Shy/inhibited young children are at risk for internalising difficulties; however, for many, this temperamental style does not result in mental health problems. This study followed a population-based sample of temperamentally inhibited preschool children into mid childhood to explore the aetiology of clinical-level anxious and depressive problems. Amongst inhibited preschool children, we aimed to predict each of clinical child anxiety and depressive problems in mid childhood from a broad range of potential risks (demographics, traumatic events and broader recent stressors, parents' well-being, and parenting practices). This study is based on data from a wider population trial of Cool Little Kids that recruited a representative sample of inhibited preschool children enrolled in their year before starting school. In 2011-2012, an inhibition screen was universally distributed to parents of children in their year before school (age 4 years) across eight diverse government areas in Melbourne, Australia. Participants were 545 parents of inhibited preschoolers (78% uptake, 545/703) who were followed to mid childhood (three annual waves 2015-2017, age 7-10 years) with 84% retention (456/545). Parents completed questionnaires spanning child ages 4-10 years, along with diagnostic interviews for child anxiety. Children also completed questionnaires in mid childhood. The questionnaires encompassed a variety of potential risks including sociodemographics, traumatic events, recent life stressors, parent wellbeing and parenting practices. In mid childhood, 57% (246/430) of inhibited preschoolers had a clinical level of anxiety problems while 22% (95/432) had depressive problems (by one or more sources). The aetiology analyses highlighted parent distress and parenting practices (overinvolved/protective, harsh discipline) as key predictors of inhibited preschoolers' internalising problems by mid childhood. Some high-risk families may not have participated. Child depression was not assessed with a diagnostic interview. The measures did not include every possible risk factor. The findings lend support to parenting programs for shy/inhibited young children that aim to prevent the development of anxiety and depression as they grow.

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BACKGROUND: Academic difficulties are common in adolescents with mental health problems. Although earlier childhood emotional problems, characterised by heightened anxiety and depressive symptoms are common forerunners to adolescent mental health problems, the degree to which mental health problems in childhood may contribute independently to academic difficulties has been little explored. METHODS: Data were drawn from a prospective cohort study of students in Melbourne, Australia (N = 1239). Data were linked with a standardised national assessment of academic performance at baseline (9 years) and wave three (11 years). Depressive and anxiety symptoms were assessed at baseline and wave two (10 years). Regression analyses estimated the association between emotional problems (9 and/or 10 years) and academic performance at 11 years, adjusting for baseline academic performance, sex, age and socioeconomic status, and hyperactivity/inattention symptoms. RESULTS: Students with depressive symptoms at 9 years of age had lost nearly 4 months of numeracy learning two years later after controlling for baseline academic performance and confounders. Results were similar for anxiety symptoms. Regardless of when depressive symptoms occurred there were consistent associations with poorer numeracy performance at 11 years. The association of depressive symptoms with reading performance was weaker than for numeracy if they were present at wave two. Persistent anxiety symptoms across two waves led to nearly a 4 month loss of numeracy learning at 11 years, but the difference was not meaningful for reading. Findings were similar when including hyperactivity/inattention symptoms. CONCLUSIONS: Childhood anxiety and depression are not only forerunners of later mental health problems but predict academic achievement. Partnerships between education and health systems have the potential to not only improve childhood emotional problems but also improve learning.

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This feasibility study explored suitability of a preventive intervention for internalising problems in young children for culturally and linguistically diverse families in Australia. A subsample of 62 families whose main language at home was other than English was selected from a population-based randomised trial of the Cool Little Kids parenting program. The population trial recruited 545 inhibited preschool children. Measures included family demographics, feedback post-intervention and child internalising problems at longitudinal follow-up. Parents of children whose main language at home was not English gave feedback that Cool Little Kids was helpful for managing their inhibited child's emotional distress. Significantly fewer intervention than control children whose main language at home was not English had separation anxiety symptoms after 2 years (M (SD) = 3.00 (3.15) versus 5.95 (3.98), p = 0.041). Further work to expand accessibility of Cool Little Kids to recent immigrant parents who do not speak English could be worthwhile.

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BACKGROUND: Public health advocates have highlighted internalising problems as a leading cause of global burden of disease. Internalising problems (anxiety/depression) affect up to 20% of school-age children and can impact peer relations, school engagement and later employment and mortality. This translational trial aimed to determine whether a selective/indicated parenting group programme to prevent internalising distress in shy/inhibited preschool children had sustained effects in middle childhood. Translational design aspects were a brief parent-report screening tool for child inhibition offered universally across the population via preschools in the year before school, followed by an invitation to parents of all inhibited children to attend the parenting programme at venues in their local community. METHODS: Design of the study was a randomised controlled trial. The setting was 307 preschool services across eight socioeconomically diverse government areas in Melbourne, Australia. Participants were 545 parents of inhibited four-year-old children of which 456 (84%) were retained during middle childhood (age of seven to 10 years). Early intervention was the Cool Little Kids parenting group programme, and control was 'usual care' access to available support services in the community. Primary outcomes were child anxiety and depression symptoms (parent and child report) and DSM-IV anxiety disorders (assessor masked). Secondary outcomes were parenting practices and parent mental health. RESULTS: There was no significant difference in anxiety disorders between the intervention and control group during the three annual follow-ups of the cohort in middle childhood (2015 43% vs. 41%, 2016 40% vs. 36%, 2017 27% vs. 30%, respectively; p's > .05). There were also no significant differences in child anxiety or depression symptoms (by child or parent report), parenting practices or parent mental health, between the intervention and control group during middle childhood. However, a priori interaction tests suggested that for children with anxious parents, early intervention attenuated risk for middle childhood internalising problems. CONCLUSIONS: An issue for population translation is low levels of parent engagement in preventive interventions. Initial effects of the Cool Little Kids parenting group programme in reducing shy/inhibited preschool children's internalising distress at school entry dissipated over time, perhaps due to low engagement. Future translational research on early prevention of internalising problems could benefit from screening preschool children in the population at higher risk (combining temperamental inhibition and parent distress) and incorporating motivational techniques to facilitate family engagement. Trial registration ISRCTN30996662 http://www.isrctn.com/ISRCTN30996662.

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This pilot study aimed to explore the suitability of a preventative intervention for internalising problems in young children with chronic physical health conditions. The pilot study focused on a subsample of 27 children with chronic physical health conditions within a population-level randomised controlled trial of the Cool Little Kids parenting programme. The Cool Little Kids parenting programme aims to prevent the development of internalising problems in inhibited (shy/anxious) preschool children by educating parents to reduce young children's avoidant coping styles and manage their anxiety/distress. The wider trial recruited 545 temperamentally inhibited preschool children. Measures included child health/development concerns and internalising symptoms at baseline, feedback on Cool Little Kids post-intervention and child internalising problems at one- and two-year longitudinal follow-up. At baseline, inhibited children with and without chronic physical health conditions had levels of internalising symptoms above the normative mean. At post-intervention, parents of children with chronic physical health conditions gave feedback that Cool Little Kids was helpful for managing their child's emotional distress. At follow-up, significantly fewer intervention than control children with chronic physical health conditions had specific phobia after 1 year (25% vs 70%) and specific fear symptoms after 2 years (mean 9.57 vs 16.89). As the pilot findings are promising, a further trial of Cool Little Kids in a physical health treatment service with a larger sample of children with chronic physical illness diagnoses would be worthwhile.

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BACKGROUND: The aim was to determine outcomes in the first year of school of a population-delivered parenting program to prevent internalising problems in temperamentally inhibited preschool children and predictors of engagement in parenting groups. METHOD: Design: Randomised controlled trial. SETTING: 307 preschool services across eight socio-economically diverse government areas in Melbourne, Australia. PARTICIPANTS: 545 parents of inhibited 4-year-old children; 469 (86%) retained at two-year follow-up. INTERVENTION: Cool Little Kids program. Primary outcomes were child internalising symptoms and anxiety disorders. Secondary outcomes were parenting, parent well-being and engagement. Trial registration ISRCTN30996662 http://www.isrctn.com/ISRCTN30996662. RESULTS: In the first year of school (M (SD) age 6.7 (0.4) years), child anxiety symptoms were reduced in the intervention versus control arm (PAS-R M (SD): total 36.2 (17.2) versus 39.4 (18.5); adjusted difference -3.26, 95% CI -6.46 to -0.05, p = .047; specific fears 9.1 (6.2) versus 10.7 (6.8), adjusted difference -1.53; 95% CI -2.69 to -0.38, p = .009). However, there was little difference in broader child internalising (CMFWQ M (SD): 2.2 (0.5) versus 2.3 (0.6); adjusted difference -0.03, 95% CI -0.13 to 0.06, p = .489) or anxiety disorders (37.6% vs. 42.6%; adjusted OR 0.79, 95% CI 0.53 to 1.18, p = .242). Lower income, younger mothers, less educated and more culturally diverse fathers engaged less with the intervention. Continued skills practice was less frequent for parents of girls and in advantaged neighbourhoods. CONCLUSIONS: There were population effects of Cool Little Kids in the first year of school for anxiety symptoms but not disorders. Considering motivation techniques to engage subgroups of families would be helpful in translation research.

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Objectives: There is evidence that diet quality is associated with mental health problems in adults and adolescents. Yet the extent to which overall diet quality (not individual nutrients or dietary patterns) may be associated with mental health problems in pre-adolescent children, a common time for first onset of symptoms, remains unclear. This study examined associations between overall diet quality, using a brief measure, and mental health problems during late childhood, in a large community sample. Methods: Participants were 787 eight and nine-year-old children taking part in the Childhood to Adolescence Transition Study. Parents reported on their child's mental health problems using the Strengths and Difficulties Questionnaire and on their child's diet quality, using a six-item screening tool. Results: Regression analyses were conducted, adjusting for child age, sex, body mass index, and family socioeconomic status. Overall diet quality was significantly associated with children's mental health before (beta = -0.11, 95% CI -0.18 to -0.04, p = 0.004) and after adjustments for age, sex, body mass index and family socioeconomic status (beta = -0.10, 95% CI -0.18 to -0.03, p = 0.007). Conclusion: Concordant with previous literature, results indicate that better overall diet quality is related to more positive mental health in pre-adolescent children. Additionally, these results support the utility and efficacy of a brief (six-item) parent-report questionnaire as an indicator of overall diet quality.

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BACKGROUND: This study explored whether temperamentally inhibited children who experience early trauma are vulnerable to developing internalizing problems in the face of later life-stressors. METHODS: A validated screen for temperamental inhibition was distributed to parents of young children attending preschools in six government regions of Melbourne, Australia. Screening identified 11% of children as inhibited (703 of 6347 screened) and eligible for a prevention study. Participants were 545 parents of inhibited preschoolers (78% uptake), of whom 84% were followed into mid childhood (age 7-10 years: wave 1, n = 446; wave 2, n = 427; wave 3, n = 426). Parents and children then completed questionnaires for child internalizing (anxious and depressive) symptoms, and parents received a diagnostic interview for child anxiety disorder. In mid-childhood parents also completed questionnaires annually to describe recent life-stressors experienced by their child, and any potentially traumatic events in the first four years of life. RESULTS: Only one in 14 temperamentally inhibited children had experienced a potentially traumatic event in early childhood. In mid childhood 56% experienced recent life-stressors. Inhibited children who had early life trauma experienced slightly more anxiety disorder and symptoms in mid childhood. Those children with more recent life-stressors in mid childhood also had slightly more symptoms of anxiety and depression. In contrast to stress sensitization, inhibited children with early trauma plus recent stressors did not show especially high mid-childhood internalizing difficulties. CONCLUSIONS: Early life trauma and recent life-stressors each convey a small risk for children with an inhibited temperament to develop internalizing problems. Nevertheless, early life stress may not always result in negative sensitization for children in the general population.

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OBJECTIVE: A translational trial evaluated the effectiveness of screening for inhibited childhood temperament, followed by a preventive parenting program -Cool Little Kids. This study determined the cost-effectiveness from societal and health sector perspectives using trial data. METHOD: Resources to deliver the screening and parenting sessions were determined from study records. Parents completed a questionnaire reporting resources used at one-year follow-up. Standard Australian unit costs were applied. Clinical outcomes for children and parental quality adjusted life-years (QALYs) were used to calculate incremental cost-effectiveness ratios (ICERs). RESULTS: Total societal costs were lower, but non-significant for the intervention compared to the control group (mean difference -$500 p = 0.937). Total health sector costs were significantly greater (mean difference $1,956; p = 0.015). The intervention led to significantly fewer internalising symptoms (Strengths and Difficulties Questionnaire (SDQ)-emotional difficulties adjusted mean difference -0.5; p = 0.006), fewer children with SDQ-emotional symptoms in the abnormal range (24.2 % vs. 33.0 % p = .014) and fewer with diagnosed anxiety (44.2 % vs. 50.2 % p = 0.427). From the societal perspective, the intervention would likely be cost-effective. Health sector ICERs were $1,171/SDQ-emotional symptom decrease, $51/abnormal SDQ avoided and $77/anxiety case avoided. CONCLUSIONS: This economic analysis alongside an implementation study provides an early indication that Cool Little Kids may be cost-effective.

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BACKGROUND: The Online Assessment of Preschool Anxiety (OAPA) is a newly developed measure that assesses anxiety disorders in preschool children aged 3-6 years. This study aimed to explore the OAPA's initial psychometric properties with a particular focus on examining its construct validity, both convergent and discriminant. METHOD: The OAPA was completed online by a community sample of 319 Australian parents of temperamentally inhibited preschool children (M: 5.3 years). Preliminary diagnoses were automatically generated before assessment reports were reviewed by a psychologist. Construct validity was examined by assessing the degree of agreement between the OAPA and existing valid questionnaire measures that were simultaneously administered online. RESULTS: Nearly half of participants met criteria for a child anxiety disorder according to the OAPA, most commonly social phobia. Findings supported convergent validity with the Revised Preschool Anxiety Scale (an anxiety symptom measure), the Children's Anxiety Life Interference Scale - Preschool Version (a measure of life interference from anxiety), the Emotional Symptoms scale of the Strengths and Difficulties Questionnaire-Parent Version (a measure of broader internalizing symptoms), as well as an over-involved/protective parenting scale. Findings also supported initial discriminant validity with the Conduct Problems scale of the Strengths and Difficulties Questionnaire-Parent Version. CONCLUSIONS: Results of this study provide evidence for the OAPA's preliminary construct validity. With further research into the OAPA's reliability (test-retest and interrater) and confirming construct validity, the OAPA may be a useful instrument for use in research settings and clinical practice.

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The aim of this study was to explore how some temperamentally inhibited young children and not others in the general population develop anxiety disorders and broader clinical-level internalizing (anxious/depressive) problems, with a focus on the family. A brief screening tool for inhibition was universally distributed to parents of children in their year before starting school across eight socioeconomically diverse government areas in Melbourne, Australia (307 preschool services). Screening identified 11% of all children as inhibited. We invited all parents of inhibited children to participate in a longitudinal prevention study. Participants were 545 parents of inhibited pre-schoolers (78% uptake) of whom 498 (91%) completed assessment one year later and 469 (86%) two years later. Parents completed questionnaires to assess parenting practices, parent wellbeing, and child internalizing problems. Parents also engaged in structured diagnostic interviews to assess child anxiety disorders. During the follow up period close to half of the inhibited young children had anxiety disorders and one in seven had clinical-level internalizing problems, with girls perhaps at higher risk. The family variables significantly predicted inhibited children's anxiety disorders and broader internalizing problems. For child anxiety disorders, overinvolved/protective parenting was particularly important for girls and boys, and poorer parent wellbeing contributed. For child anxious/depressive problems, harsh discipline was a consistent predictor for girls and boys, and poorer parent wellbeing again contributed. These etiological findings support early intervention for temperamentally inhibited young children that focuses on the family environment to prevent the development of mental health problems.

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AIM: To examine, in a community cohort of healthy one-month-old infants, (i) the prevalence of early infant sleeping, crying and feeding problems; (ii) the extent to which they co-exist; and (iii) infant and mother characteristics associated with each problem alone and with comorbid problems. METHODS: A survey at 4 weeks of infant age examined the presence of infant sleeping, crying and feeding problems (yes/no); parenting self-efficacy; rating of self as a tense person; and doubts about parenting at bedtime. RESULTS: A total of 770 mothers (39% of those approached) with a total of 781 infants (11 twins) took part. Infant sleeping, crying and feeding problems were reported by 38.5, 27.4 and 25.2% of mothers, respectively. On comorbidity, 25.5% reported one problem, 20.5% reported two and 7.3% reported all three problems. Mothers of first-born infants reported more crying problems and comorbid problems. Mothers who described themselves as a 'tense person' reported more infant feeding problems. Maternal doubt and low self-efficacy were consistently associated with each type of infant problem and comorbid problems (adjusting for other factors). CONCLUSION: Mothers expressing doubt and low parenting self-efficacy may benefit from additional support and guidance on normal infant behaviour.

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This pilot study explored acceptability to parents and outcomes for children of a preventive intervention for anxiety problems in pre-schoolers with autism spectrum disorder (ASD) who were an identified sub-group within a population-based randomised trial of the Cool Little Kids parenting group programme. The population trial included 545 temperamentally inhibited pre-schoolers recruited across eight economically diverse areas of Melbourne, Australia. Within this sample, 26 parents reported that their child had received an ASD diagnosis. Trial measures included baseline inhibited temperament and developmental problems, post-intervention feedback on the programme, and caregiver-reported child mental health outcomes (anxiety diagnoses and internalising symptoms) at 1- and 2-year follow-up. Sample retention for the children with ASD over 2 years was strong (92%). At follow-up, fewer intervention than control children with ASD had anxiety disorders after 1 year (% (n): 25 (3) vs. 77 (10), P = .028) and separation anxiety symptoms after 2 years (M (SD): 4.22 (2.68) vs. 9.38 (5.91), P = .017). Similar effects favouring the intervention group were apparent across other child emotional outcome measures but without statistical significance in this small sample. Parents of the children with ASD reported that Cool Little Kids was "quite useful" in relation to their child's anxiety but also gave feedback that they would appreciate some tailoring of programme content to the context of ASD. These pilot findings suggest Cool Little Kids may be helpful for reducing comorbid anxiety in pre-schoolers with ASD. Further research is warranted to develop an ASD-specific adaptation which can be trialled with a larger sample of children with confirmed ASD diagnosis. Trial registration ISRCTN30996662 http://www.isrctn.com/ISRCTN30996662. Autism Res 2018, 11: 1166-1174. © 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Many children with autism spectrum disorder (ASD) also have anxiety. This pilot study explored acceptability to parents and outcomes for pre-schoolers with ASD of a parenting group programme to prevent anxiety problems. Among the sample of 26 pre-schoolers with ASD, we found reduced anxiety disorders and separation symptoms when their parents had received the intervention, as reported by caregivers in checklists and clinical interviews. Parents gave feedback that the programme was useful but suggested content be adapted to the context of ASD.

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Previous research has identified factors related to outcome in child anxiety treatment and parent training programs for child behavior problems. However, it is unclear what factors predict outcomes in interventions delivered online to parents of young children at risk of anxiety. This study investigated predictors of child anxiety outcomes among 433 families with young children (3-6 years) who participated in a randomized controlled trial of Cool Little Kids Online, an eight-module early intervention program for child anxiety based on cognitive-behavioral therapy (CBT). Potential predictors included baseline demographic factors, child and parent mental health factors, and indicators of program use, including number of online modules completed and frequency of homework practice. Results showed that only access to a printer moderated intervention effectiveness. Printer access predicted lower child anxiety in the Cool Little Kids Online group, but had no effect on outcomes in the wait-list group. In both groups, higher levels of child anxiety symptoms, child-inhibited temperament, and poorer parent mental health at baseline predicted higher levels of child anxiety symptoms at 6-month follow-up. The amount of online program use was not related to improvements in child anxiety symptoms. However, parents who reported practicing the program skills more frequently showed greater reductions in child anxiety, and access to a printer was related to frequency of program skills practice. These findings provide empirical support for the important role of skills practice in online CBT interventions, and suggest that practicing program skills may be more important than completing the online modules.

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BACKGROUND: Frequent bullying predicts adolescent mental health problems, particularly depression. This population-based study with young Australian primary school children aimed to determine the frequency and mental health correlates of bullying, and whether friendship could be protective. METHOD: Participants were a population-based sample of 1221 children aged 8-9 years attending 43 primary schools in metropolitan Melbourne, Australia. Children were taking part in the Childhood to Adolescence Transition Study. Children completed online questionnaires at school to measure peer relations and emotional well-being. Parents reported on their child's mental health in questionnaires sent to the home. RESULTS: One in three children (29.2%) reported experiencing frequent bullying, defined as at least once a week. This included physical bullying alone (13.8%), verbal bullying alone (22.7%) and the combination (7.4%). Children who reported being frequently bullied self-reported higher internalising symptoms compared with children who did not report frequent bullying (M (SD) 1.6 (0.9) vs. 1.1 (0.8), p < .001). This difference was confirmed by parents' reports of their child's internalising symptoms (M (SD) 2.4 (2.3) vs. 2.1 (2.0), p = .026, respectively). Amongst children who reported frequent bullying, those with a group of friends had better emotional well-being. CONCLUSIONS: A substantial proportion of children report experiencing bullying on a weekly basis early in primary school. Given the prevalence of bullying in primary school and its relationship to children's mental health, we recommend effective school-wide antibullying programmes. Further research can explore whether intervention to foster a group of friends around bullied children can improve their emotional well-being.

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OBJECTIVE: To determine whether a population-delivered parenting programme assists in preventing internalising problems at school entry for preschool children at-risk with temperamental inhibition. METHODS: Design: a randomised controlled trial was used. SETTING: the setting was 307 preschool services across eight socioeconomically diverse government areas in Melbourne, Australia. PARTICIPANTS: a total of 545 parents of inhibited 4-year-old children: 498 retained at 1-year follow up. Early intervention: Cool Little Kids parenting group programme was implemented. Primary outcomes: the primary outcomes were child DSM-IV anxiety disorders (assessor blind) and internalising problems. SECONDARY OUTCOMES: the secondary outcomes were parenting practices and parent mental health. RESULTS: At 1-year follow up (mean (standard deviation) age = 5.8 (0.4) years), there was little difference in anxiety disorders between the intervention and control arms (44.2% vs 50.2%; adjusted odds ratio = 0.86, 95% confidence interval = [0.60, 1.25], p = 0.427). Internalising problems were reduced in the intervention arm (Strengths and Difficulties Questionnaire: abnormal - 24.2% vs 33.0%; adjusted odds ratio = 0.56, 95% confidence interval = [0.35, 0.89], p = 0.014; symptoms - mean (standard deviation) = 2.5 (2.0) vs 2.9 (2.2); adjusted mean difference = -0.47, 95% confidence interval = [-0.81, -0.13], p = 0.006). Parents' participation in the intervention was modest (29.4% attended most groups, 20.5% used skills most of the time during the year). A priori interaction tests suggested that for children with anxious parents, the intervention reduced anxiety disorders and internalising symptoms after 1 year. CONCLUSION: Offering Cool Little Kids across the population for inhibited preschoolers does not impact population outcomes after 1 year. Effects may be emerging for inhibited children at highest risk with parent anxiety. Trial outcomes will continue into mid-childhood.

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Despite growing recognition of childhood anxiety as a common and often debilitating clinical concern, we have limited knowledge of the particular ways in which anxiety interferes with daily life for young children who have not yet entered formal schooling. The present study evaluated the psychometric properties of the Child Anxiety Life Interference Scale - Preschool Version (CALIS-PV). The CALIS-PV is a brief (18 item) parent-report measure of the impacts of a young child's anxiety on their own life and that of her or his parent. Participants were 784 parents of a child aged 3-7 years, who completed the CALIS-PV as a part of the follow-up assessment battery for two anxiety prevention trials targeted at preschool children with temperamental inhibition. Confirmatory factor analysis supported three CALIS-PV factors reflecting anxiety-related life interference at home, outside home and on parent life. The three factors showed good internal consistency and good convergent and divergent validity, and successfully differentiated children with and without an anxiety diagnosis. Findings provide initial support for the CALIS-PV as a reliable and valid measure of the daily life impacts of childhood anxiety for preschool-aged children and their parents.

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Background/aims Achieving a high response rate to follow-up questionnaires in randomized controlled trials of interventions is important for study validity. Few studies have tested the value of incentives in increasing response rates to online questionnaires in clinical trials of health interventions. This study evaluated the effect of a gift card prize-draw incentive on response rates to follow-up questionnaires within a trial of an online health intervention. Method The study was embedded in a host randomized controlled trial of an online parenting program for child anxiety. A total of 433 participants were randomly allocated to one of two groups: (1) being informed that they would enter a gift card prize-draw if they completed the final study questionnaire (24-week follow-up) and (2) not informed about the prize-draw. All participants had a 1 in 20 chance of winning an AUD50 gift card after they completed the online questionnaire. Results The odds of the informed group completing the follow-up questionnaire were significantly higher than the uninformed group, (79.6% vs 68.5%, odds ratio = 1.79, 95% confidence interval = 1.15-2.79). This response rate increase of 11.1% (95% confidence interval = 2.8-19.1) occurred in both intervention and control groups in the host randomized controlled trial. The incentive was also effective in increasing questionnaire commencement (84.6% vs 75.9%, odds ratio = 1.74, 95% confidence interval = 1.07-2.84) and reducing the delay in completing the questionnaire (19.9 vs 22.6 days, hazard ratio = 1.34, 95% confidence interval = 1.07-1.67). Conclusion This study adds to evidence for the effectiveness of incentives to increase response rates to follow-up questionnaires in health intervention trials.

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OBJECTIVE: The Cool Little Kids parenting group program is an effective intervention for preventing anxiety disorders in young children who are at risk because of inhibited temperament. The program has six group sessions delivered by trained psychologists to parents of 3- to 6-year-old children. An online adaptation (Cool Little Kids Online) has been developed to overcome barriers to its wide dissemination in the community. This study tested the efficacy of Cool Little Kids Online in a randomized controlled trial. METHOD: A total of 433 parents of a child aged 3 to 6 years with an inhibited temperament were randomized to the online parenting program or to a 24-week waitlist. The online program has 8 interactive modules providing strategies that parents can implement with their child to manage their child's avoidant coping, reduce parental overprotection, and encourage child independence. Parents were provided telephone consultation support with a psychologist when requested. Parents completed self-report questionnaires at baseline and at 12 and 24 weeks after baseline. RESULTS: The intervention group showed significantly greater improvement over time in child anxiety symptoms compared to the control group (d = 0.38). The intervention group also showed greater reductions in anxiety life interference (ds = 0.33-0.35) and lower rates of anxiety disorders than the control group (40% versus 54%), but there were minimal effects on broader internalizing symptoms or overprotective parenting. CONCLUSION: Results provide empirical support for the efficacy of online delivery of the Cool Little Kids program. Online dissemination may improve access to an evidence-based prevention program for child anxiety disorders. Clinical trial registration information-Randomised Controlled Trial of Cool Little Kids Online: A Parenting Program to Prevent Anxiety Problems in Young Children; http://www.anzctr.org.au/; 12615000217505.

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BACKGROUND: Prior anxiety and depression have been identified as risk factors for maternal perinatal mental health problems, but other preconception mental disorders have not been prospectively examined. This study investigated prospectively whether women with preconception personality disorder have increased rates of antenatal anxiety and/or depressive symptoms. METHODS: 244 women in a population cohort were assessed for personality disorder at age 24 using the Standardised Assessment of Personality. Five to twelve years later, women were screened with the Clinical Interview Schedule, Revised Anxiety Subscale and the Edinburgh Postnatal Depression Scale during the third trimester of 328 pregnancies. RESULTS: Preconception personality disorder was associated with a three-fold increase in the odds of antenatal anxiety symptoms, which remained with adjustment for preconception background factors and preconception common mental disorder (adjusted OR 2.84, 95% CI 1.31-6.15). Preconception personality disorder was associated with doubled odds of antenatal depressive symptoms, however this was attenuated with adjustment for preconception background factors and preconception common mental disorder (adjusted OR 1.98, 95% CI 0.81-4.81). LIMITATIONS: Our findings are restricted to pregnant women aged 29-35 years. Anxiety and depression may have been under-identified because they were assessed at a single antenatal time point. Residual confounding of the associations by preconception common mental disorder at other time points may have occurred. CONCLUSIONS: Women with personality disorder are at heightened risk of anxiety symptoms in pregnancy, over and above risks associated with prior common mental disorder. This raises a possibility that pregnancy brings particular emotional challenges for women with personality disorders.

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