[Associations of hyperlipidemia and its subtypes with blood lead levels in Lu'an City community older adults in 2016].

Objective: To explore associations of hyperlipidemia and its subtypes with blood lead levels in community older adults.
Methods: From June to September, 2016, a rural and an urban community in Lu'an City, Anhui Province were randomly selected. Older adults aged 60 years old or over in two communities were recruited to participate, receiving a questionnaire interview(including gender, age, region, education, occupation, marital status, lifestyle, and chronic medical history, etc. ), physical examinations(height, weight, and blood pressure) and laboratory tests(blood glucose, blood lipid, and blood lead levels). A total of 1080 older adults volunteered to participate, of which 1008 had completedata. Inductively coupled plasma mass spectrometry was used to measure concentrations of blood lead. The interquartile range was used to divide the distribution of lead in blood. Logistic regression model was used to examine associations of hyperlipidemia and its subtypes with blood lead levels. Restrictive cubic splineswere used to further determine potential dose-response relationships.
Results: Of 1008 older adults, the mean age was(71.9±6.5) years old, 459(45.5%)were male, and 557(55.3%) were from the rural community. The prevalence of hyperlipidemia was 51.2%(n=516). The detection rate and geometric mean of blood lead were 100% and 28.08 μg/L(ranged from 7.89 to 278.33 μg/L), respectively. Univariate analysis showed that older adults in the highest quartile group of blood lead(≥75%) had higher odds of hyperlipidemia(OR=1.42, 95%CI 1.00-2.02) and two subtypes(high total serum cholesterol(OR=1.83, 95%CI 1.25-2.68)and mixed hyperlipidemia(OR=1.49, 95%CI 0.83-2.67)) compared to counterparties in the lowest quartile group(≤25%). After adjustment for gender, age, region, education, occupation, marital status, smoking, drinking, exercise conditions, diet, high blood pressure, diabetes, and body mass index, the ORs for hyperlipidemia and mixed hyperlipidemia in the highest quartile group of blood lead were 1.55(95%CI 1.02-2.36) and 2.87(95%CI 1.44-5.70). The restricted cubic spline curves showed approximate linear relationships between blood lead levels and ORs of hyperlipidemia and mixed hyperlipidemia.
Conclusion: Linear associations of blood lead levels with hyperlipidemia and mixed hyperlipidemia were found in community older adults.