RESUMEN
Rationale and Objective: The NKF-ASN Task Force recommends accurate kidney function estimation avoiding biases through racial adjustments. We explored the use of multiple kidney function biomarkers and hence estimated glomerular filtration rate (eGFR) equations to improve kidney function calculations in an ethnically diverse patient population. Study design: Prospective community cohort study. Setting and Participants: rural New Mexico clinic with patients > 18 yo. Methods: Markers of kidney function, IDMS-Creatinine (SCr), chemiluminescence Beta-2 Microglobulin (B2M), Nephelometry-calibrated ELISA Cystatin C (CysC), inflammation, glucose tolerance, demographics, BUN/UACR from the baseline visit of the COMPASS cohort, were analyzed by Kernel-based Virtual Machine learning methods. Results: Among 205 participants, the mean age was 50.1, 62% were female, 54.1% Hispanic American and 30.2% Native American. Average kidney function biomarkers were: SCr 0.9 mg/dl, B2M 1.8 mg/L, and CysC 0.7 mg/dl. The highest agreement was observed between SCr and B2M-based eGFR equations [mean difference in eGFRs: (4.48 ml/min/1.73m2], and the lowest agreement between B2M and CysC-based eGFR equations (-24.75 ml/min/1.73m2). There was no pattern of association between the differences in eGFR measures and gender. In the continuous analyses, the absolute eGFR value (p<2 x 10-16) and serum albumin (p =6.4 x 10-5) predicted the difference between B2M- and SCr-based e-GFR. The absolute eGFR value (p<2 x 10-16) and age (p =7.6 x 10-5) predicted the difference between CysC- and SCr-based e-GFR. Limitations: Relatively small sample size, elevated inflammatory state in majority of study participants and no inulin excretion rate measurements. Conclusion: B2M should be strongly considered as a kidney function biomarker fulfilling the criteria for the NKF-ASN. B2M's eGFR equation does not need adjustment for gender or race and showed the highest agreement with SCr-based eGFR equations.
RESUMEN
BACKGROUND: Naloxone is a safe and effective medication to help reverse opioid overdose. Providing take-home naloxone to patients in opioid treatment settings is a critical step to reducing opioid overdose deaths. In New Mexico, a US state with one of the highest rates of opioid overdose deaths, legislation was passed in 2017 (House Bill 370) to support take-home naloxone, and followed by naloxone training of Opioid Treatment Program staff to increase distribution. METHODS: Naloxone training was offered to all New Mexico Opioid Treatment Programs along with a baseline survey to assess current practices and barriers to take-home naloxone distribution. Focus groups were conducted approximately 1 year post-training with staff at a subset of the trained Opioid Treatment Programs to assess the impact of the legislation and training provided. RESULTS: Baseline survey results show most Opioid Treatment Program staff were unfamiliar with House Bill 370, reported conflicting understandings of their agency's current take-home naloxone practices, and reported a number of barriers at the patient, agency, and policy level. Follow-up focus groups revealed support for House Bill 370 but persistent barriers to its implementation at the patient, agency, and policy level including patient receptivity, cost of naloxone, staff time, and prohibitive pharmacy board regulations. CONCLUSIONS: In spite of targeted legislation and training, provision of take-home naloxone at remained low. This is alarming given the need for this lifesaving medication among the Opioid Treatment Program patient population, and high opioid death rate in New Mexico. Locally, important next steps include clarifying regulatory guidelines and supporting policy/billing changes to offset costs to Opioid Treatment Programs. Globally, additional research is needed to identify the prevalence of take-home naloxone distribution in similar settings, common barriers, and best practices that can be shared to increase access to this vital lifesaving medication in this critical context.