摘要目的:探讨儿童至中年期的体重指数（body mass index，BMI）轨迹与成年期亚临床肾损伤（subclinical renal damage，SRD）的发生关系。方法:1987年在陕西汉中三个镇选取4 623名6~18岁儿童和青少年建立"汉中青少年高血压研究队列"，并分别于1989年、1992年、1995年、2005年、2013年和2017年进行随访，基于群体轨迹模型，根据不同BMI轨迹变化对人群进行分组，采用广义线性模型分析不同BMI轨迹与中年期SRD发生的关系。结果:共纳入从儿童到中年期随访的2 678名受试者，根据BMI轨迹变化将人群分为：低增长组（ n=1 017）、中增长组（ n=1 353）和高增长组（ n=308），其中共有248名（9.3%）受试者在中年期出现SRD。低增长组、中增长组和高增长组尿白蛋白/肌酐比分别为0.9（0.6，1.4）、1.0（0.7，1.7）、1.6（0.8，3.2）（ P趋势<0.001），估算肾小球滤过率分别为98.5（87.6，111.6）、96.2（86.4，109.7）、95.3（87.5，125.0）ml·min -1·(1.73 m 2) -1（ P趋势=0.025）。广义线性模型分析结果显示，从BMI低增长组到高增长组，尿白蛋白/肌酐比呈线性增加趋势[ β=3.16（95% CI 1.02~5.31）， P趋势=0.004]；BMI轨迹变化与估算肾小球滤过率无相关性且未呈现线性趋势[ β=-2.30（95% CI-5.18~0.57）， P趋势=0.117]。在校正性别、年龄、病史及生活方式等多种混杂因素后，BMI高增长组成年期SRD发生的风险是低增长组的2.83倍（ OR=2.83，95% CI 1.84~4.36， P趋势<0.001）。 结论:BMI增长水平较高，成年期SRD风险也显著升高。早期识别BMI轨迹可能有助于预测个体成年后的肾功能。

abstractsObjective:To investigate the association between body mass index (BMI) trajectories in children and adolescents and subclinical renal damage (SRD) in adulthood.Methods:4 623 participants aged 6-18 years old were recruited from the ongoing cohort of Hanzhong adolescent hypertension study in 1987, and the subjects were followed up in 1989, 1992, 1995, 2005, 2013 and 2017, respectively. Group-based trajectory modeling was used to identify distinct BMI trajectories in longitudinal analysis. Generalized linear model was applied to examine the association between different BMI trajectories and SRD incidence in adulthood.Results:A total of 2 678 subjects from childhood to adulthood were enrolled in this study. All subjects were divided into three groups according to three distinct BMI trajectories: low-increasing BMI group ( n=1 017), moderate-increasing BMI group ( n=1 353), and high-increasing BMI group ( n=308). Over follow up for 30 years, a total of 248 participants (9.3%) developed SRD. Urinary albumin-to-creatinine ratio (uACR) in low to high-increasing BMI group was 0.9(0.6, 1.4), 1.0(0.7, 1.7), 1.6(0.8, 3.2), respectively ( P trend<0.001), and estimated glomerular filtration rate was 98.5(87.6, 111.6) , 96.2(86.4, 109.7), 95.3 (87.5, 125.0) ml·min -1·(1.73 m 2) -1, respectively ( P trend=0.025). The generalized linear model analysis showed that uACR was increased linearly from low to high-increasing BMI group [ β=3.16(95% CI 1.02-5.31), Ptrend=0.004]. There was no correlation or linear trend between BMI trajectory and estimated glomerular filtration rate [ β=-2.30(95% CI-5.18-0.57), Ptrend=0.117]. Compared with the low-increasing BMI group, the high-increasing BMI group had greater odds of experiencing SRD in adulthood after adjusting for multiple confounders such as age, gender, medical history and lifestyle ( OR=2.83, 95% CI 1.84-4.36, Ptrend<0.001). Conclusions:Higher BMI trajectorie is correlated with higher level of uACR and risk of SRD in middle age. Identifying long-term BMI trajectorie from early age may assist in predicting individuals′ renal function in later life.