摘要目的:探讨血清溶血磷脂酰胆碱（LPC）水平与老年健康指数的相关性。方法:选取广西永福长寿队列2016年基线调查对象251名，其中中青年组（≤59岁）、年轻老年组（60~89岁）和长寿老年组（≥90岁）分别为66、63和122名。收集对象人口学资料并测量对象身高、体重、血压和脂质代谢相关指标，通过简易精神状态检查量表和日常生活活动量表结果评估老年人认知和躯体功能，构建老年健康指数。通过液相色谱串联质谱法测定血清LPC16∶0、LPC18∶0、LPC18∶1、LPC18∶2水平，比较其在不同年龄和不同健康状态组间的差异；采用logistic回归模型分析血清LPC水平与老年人健康指数的关联。结果:随年龄增加，对象中女性占比增加、吸烟和饮酒率下降，BMI、TC、TG、LDL-C、舒张压、4种LPC水平均随年龄增加而下降，收缩压水平随年龄增加而上升（均 P<0.05）。随老年人健康状态下降，血清LPC16∶0、LPC18∶0、LPC18∶1、LPC18∶2水平均呈下降趋势（均 P<0.001），调整年龄和性别因素后，仅LPC18∶0与老年健康状态相关［ OR（95% CI）：0.48（0.25~0.92）］，血清LPC18∶0浓度每增加1个标准差（16.87 nmol/L），老年人健康状态较差的风险下降52%。 结论:血清LPC18∶0是独立于年龄和性别的老年健康状态相关因素。

abstractsObjective:To investigate the relationship between serum lysophosphatidylcholine (LPC) level and the health index of the elderly.Methods:A total of 251 subjects were selected from the 2016 baseline survey of the Yongfu Longevity Cohort in Guangxi Province among whom 66, 63 and 122 were in the young and middle-aged group (≤59 years old), the young group (60-89 years old) and the longevity group (≥90 years old), respectively. Demographic data were collected and related indicators of height, weight, blood pressure and lipid metabolism were measured. The cognitive and physical functions of the elderly were assessed by the results of the simple mental state scale and the daily living activity scale to construct the health index of the elderly. The serum levels of LPC16∶0, LPC18∶0, LPC18∶1 and LPC18∶2 were determined by liquid chromatography-tandem mass spectrometry, and the differences among different ages and health status groups were compared. The logistic regression model was used to analyze the relationship between the serum LPC level and the health index of the elderly.Results:With the increase in age, the proportion of female subjects increased, and the rate of smoking and drinking decreased. BMI, TC, TG, LDL-C, diastolic blood pressure, and the four LPCs levels decreased with the increase of age, and systolic blood pressure levels increased with the increase of age (all P values<0.05). There was no significant difference in HDL-C levels among age groups ( P>0.05). With the decline of health status in the elderly, serum levels of LPC16∶0, LPC18∶0, LPC18∶1 and LPC18∶2 showed a downward trend (all P values<0.001). After adjusting for age and gender, only LPC18∶0 was associated with the health status in old age [ OR (95% CI): 0.48 (0.25-0.92)]. For every 1 standard deviation (16.87 nmol/L) increase in serum LPC18∶0 concentration, the risk of poor health status in old age decreased by 52%. Conclusion:Serum LPC18∶0 was associated with the health status in old age independent of age and sex.