Stierman Bryan, Afful Joseph, Carroll Margaret D, Chen Te-Ching, Davy Orlando, Fink Steven, Fryar Cheryl D, Gu Qiuping, Hales Craig M, Hughes Jeffery P, Ostchega Yechiam, Storandt Renee J, Akinbami Lara J
Natl Health Stat Report. 2021 Jun 14(158). doi: 10.15620/cdc:106273.
In March 2020, the coronavirus disease 2019 (COVID-19) pandemic halted National Health and Nutrition Examination Survey (NHANES) field operations. As data collected in the partial 2019-2020 cycle (herein referred to as 2019-March 2020) are not nationally representative, they were combined with previously released 2017-2018 data to produce nationally representative estimates. This report explains the creation of the 2017-March 2020 prepandemic data files, provides recommendations for and limitations of the files' use, and presents prevalence estimates for selected health outcomes based on the files.
The 2019-2020 primary sampling units (PSUs) were reassigned to the 2015-2018 sample design strata and combined with the 2017-2018 data to create a data set that could be used to calculate nationally representative estimates. A PSU-level adjustment factor was created to equalize the contribution of each stratum to the total survey sample and applied to participant base weights. Interview and examination weights were calculated from the adjusted base weights. The performance of final interview weights was assessed by comparing the demographic characteristics of the weighted NHANES 2017-March 2020 prepandemic sample with nationally representative estimates from the 2018 5-year American Community Survey. Prevalence estimates and 95% confidence intervals were calculated for selected health outcomes.
Among children and adolescents aged 2-19 years, the prevalence of obesity was 19.7% and the prevalence of untreated or restored dental caries in one or more primary or permanent teeth was 46.0%. Among adults aged 20 and over, the age-adjusted prevalence of obesity was 41.9%, severe obesity was 9.2%, and diabetes was 14.8%. Among adults aged 18 and over, the age-adjusted prevalence of hypertension was 45.1%. Among adults aged 65 and over, the age-adjusted prevalence of complete tooth loss was 13.8%.
A PSU-level adjustment factor and additional weighting adjustments made nationally representative estimates from the 2017-March 2020 prepandemic data files possible; this was the last NHANES data collected before widespread transmission of COVID-19.
2020年3月,2019冠状病毒病(COVID-19)大流行致使国家健康与营养检查调查(NHANES)的现场作业暂停。由于在2019 - 2020年部分周期(以下简称2019年3月至2020年3月)收集的数据不具有全国代表性,因此将其与先前发布的2017 - 2018年数据相结合,以得出具有全国代表性的估计值。本报告解释了2017年3月至2020年3月大流行前数据文件的创建过程,提供了使用这些文件的建议和局限性,并基于这些文件给出了选定健康结果的患病率估计值。
将2019 - 2020年的主要抽样单位(PSU)重新分配到2015 - 2018年的样本设计分层中,并与2017 - 2018年的数据相结合,以创建一个可用于计算全国代表性估计值的数据集。创建了一个PSU级别的调整因子,以均衡各分层对总调查样本的贡献,并应用于参与者的基础权重。访谈权重和检查权重根据调整后的基础权重计算得出。通过将加权后的2017年3月至2020年3月大流行前NHANES样本的人口统计学特征与2018年5年美国社区调查的全国代表性估计值进行比较,评估最终访谈权重的表现。计算选定健康结果的患病率估计值和95%置信区间。
在2至19岁的儿童和青少年中,肥胖患病率为19.7%,一颗或多颗乳牙或恒牙未经治疗或已修复龋齿的患病率为46.0%。在20岁及以上的成年人中,年龄调整后的肥胖患病率为41.9%,重度肥胖患病率为9.2%,糖尿病患病率为14.8%。在18岁及以上的成年人中,年龄调整后的高血压患病率为45.1%。在65岁及以上的成年人中,年龄调整后的牙齿全部缺失患病率为13.8%。
PSU级别的调整因子和额外的权重调整使得从2017年3月至2020年3月大流行前数据文件中得出全国代表性估计值成为可能;这是在COVID-19广泛传播之前收集的最后一批NHANES数据。