RESUMEN
BACKGROUND: Cadmium is a ubiquitous and persistent metal, associated with different harmful health effects and with increased morbidity and mortality. Understanding the main sources of exposure is essential to identify at risk populations and to design public health interventions. OBJECTIVE: To evaluate cadmium exposure in a random-sample of general adult population from three regions of Spain, assessed by the urinary cadmium (U-Cd) concentration, and to identify its potential determinants and sex-specific differences, including sociodemographic, lifestyle and dietary factors. MATERIALS AND METHODS: We measured U-Cd (µg/g creatinine) in single urine spot samples from 1282 controls enrolled in the multicase-control study in common tumors in Spain (MCC-Spain) with inductively coupling plasma-mass spectrometry equipped with an octopole reaction systems (ICP-ORS-MS). The association between sociodemographic, lifestyle, and dietary characteristics and U-Cd concentrations was evaluated using geometric mean ratios (GMR) estimated by multiple log-linear regression models. RESULTS: Overall, geometric mean U-Cd concentration was 0.40 (95%CI: 0.38, 0.41) µg/g creatinine. Levels were higher in women than in men (GMR]: 1.19; 95%CI: 1.07, 1.32), and increased with age in males (ptrend< 0.001). Cigarette smoking was clearly associated to U-Cd levels (GMRformer vs non-smokers: 1.16; 95%CI: 1.05, 1.29; GMRcurrent vs non-smokers: 1.42; 95%CI: 1.26, 1.60); the relationship with secondhand tobacco exposure in non-smokers, was restricted to women (pinteraction = 0.02). Sampling season and region also seemed to influence U-Cd concentrations, with lower levels in summer (GMRsummer vs average: 0.79; 95%CI: 0.71, 0.88), and higher levels in North-Spain Asturias (GMRAsturias vs average: 1.13; 95%CI: 1.04, 1.23). Regarding diet, higher U-Cd concentration was associated with eggs consumption only in men (pinteraction = 0.04), just as rice intake was associated in women (pinteraction = 0.03). CONCLUSION: These results confirmed that tobacco exposure is the main modifiable predictor of U-Cd concentrations, and remark that the role of dietary/sociodemographic factors on U-Cd levels may differ by sex.
Asunto(s)
Cadmio , Exposición a Riesgos Ambientales , Adulto , Cadmio/orina , Creatinina/orina , Dieta , Exposición a Riesgos Ambientales/análisis , Femenino , Humanos , Masculino , EspañaRESUMEN
OBJECTIVE: Dietary guidelines are intended to prevent chronic diseases and obesity. The aim of the present study was to develop a diet quality index based on the Spanish Food Pyramid (SFP) and to further explore its association with obesity in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Granada study. DESIGN: Cross-sectional study. The SFP score considered recommendations given for twelve food groups, and for physical activity and alcohol consumption. Obesity was defined as BMI over 30 kg/m2 and abdominal obesity as waist circumference larger than 102 cm (men) and 88 cm (women). Logistic regression was conducted to estimate odds ratios of obesity by quintiles and by 10-point increment in adherence to the score, controlling for potential confounders. SETTING: EPIC-Granada study. SUBJECTS: Participants (n 6717) aged 35-69 years (77 % women). RESULTS: A 10-point increase in adherence to the SFP score was associated with a 14 % (OR=0·86; 95 % CI 0·79, 0·94) lower odds of obesity in men (P interaction by sex=0·02). The odds of abdominal obesity decreased globally by 12 % (OR=0·88; 95 % CI 0·84, 0·93) per 10-point increase in adherence to this score. The effect of higher adherence to the score on abdominal obesity was stronger in physically inactive men and women (ORper 10-point increase=0·79; 95 % CI 0·68, 0·92 and ORper 10-point increase=0·89; 95 % CI 0·84, 0·95, respectively). CONCLUSIONS: These findings support that the Spanish dietary guidelines might be an effective tool for obesity prevention. However, prospective studies investigating this association are warranted.