上海市闵行区成年居民身高与体质量和腰围自报值与测量值的Bland-Altman分析

Bland-Altman analysis on the concordance of self-reported and measured height, weight and waist circumference of adult residents in Minhang district of Shanghai

目的评价上海市闵行区居民身高、体质量和腰围自报值与测量值的一致性,为采取有针对性的防治策略提供依据。方法 2017年6月—2018年5月,采用多阶段抽样方法,抽取≥18岁常住居民1 698人,采用自报和测量的方式分别收集身高、体质量、腰围数据,并进行一致性比较分析。结果调查对象身高、体质量、腰围知晓率分别为61.72%、61.66%、25.80%。调查对象身高自报值高于测量值1.14 cm,体质量自报值高于测量值0.17 kg,腰围自报值低于测量值2.72 cm,身高(t=15.18,P<0.01)、体质量(t=2.55,P=0.01)、腰围(t=12.03,P<0.01)自报值与测量值差值间差异均有统计学意义。80.92%调查对象自报BMI分类准确,超重肥胖调查对象自身BMI低估率12.04%、高估率5.71%。Bland-Altman分析显示,身高、体质量、腰围自报值与测量值的差值超出95%一致性限范围的点均<5%,分别为4.97%、1.31%、4.18%。结论上海市闵行区居民存在身高、体质量和腰围自报值与测量值整体一致性良好,但超重肥胖被自报低估并存的现象。

Objective To assess the concordance of self-reported and measured height, weight and waist circumference through Bland-Altman analysis. Methods A total of 1 698 local residents aged 18 years and above were randomly selected using multi-stage sampling method, the height, weight and waist circumference were reported by participants and also physically measured by study investigators.Two data sets were analyzed for the agreement by Bland-Altman analysis. Results The awareness rates for height, weight and waist circumference were 61.72%, 61.66% and 25.80%, respectively.Compared to the actual measured values, the self-reported height and weight were 1.14 cm higher and 0.17 kg heavier, while the self-reported waist circumference was 2.72 cm smaller, the differences were statistically significant(t=15.18,2.55,12.03,P<0.01,0.01, <0.01).80.92% of participants reported a proper classified BMI.Among participants with overweight and obesity, 12.04% underestimated while 5.71% overestimated their BMIs.Bland-Altman analysis showed that only 4.97%, 1.31% and 4.18% with the differences between self-reported and measured values in height, weight and waist circumference were above 95% limits of agreement(LoA). Conclusions There are smaller discrepancies between self-reported and measured values in height, weight and waist circumference among local residents in Minhang district of Shanghai.However, residents with overweight or obesity tend to underestimate their anthropometric values.