NHANES

Birth control pills and risk of hypothyroidism: a cross-sectional study of the National Health and Nutrition Examination Survey, 2007–2012
Yuxuan Qiu, Yuanyuan Hu, Zhichao Xing, Qingyu Fu, Jingqiang Zhu, Anping Su

BMJ Open Jun 2021, 11 (6) e046607; DOI: 10.1136/bmjopen-2020-046607
Association between normal triglyceride and insulin resistance in US adults without other risk factors: a cross-sectional study from the US National Health and Nutrition Examination Survey, 2007–2014
Chunli Bi, Lijuan Wang, Chong Sun, Mengzi Sun, Pingping Zheng, Zhiqiang Xue, Li Shen, Pan Pan, Jiagen Li, Yaogai Lv, Anning Zhang, Bo Li, Xinyao Zhang, Yan Yao, Lina Jin

BMJ Open Aug 2019, 9 (8) e028652; DOI: 10.1136/bmjopen-2018-028652
Visual impairment and objectively measured physical activity and sedentary behaviour in US adolescents and adults: a cross-sectional study
Lee Smith, Sarah E Jackson, Shahina Pardhan, Guillermo Felipe López-Sánchez, Liang Hu, Chao Cao, Davy Vancampfort, Ai Koyanagi, Brendon Stubbs, Joseph Firth, Lin Yang

BMJ Open Jul 2019, 9 (4) e027267; DOI: 10.1136/bmjopen-2018-027267
Associations between blood cadmium levels and cognitive function in a cross-sectional study of US adults aged 60 years or older
Hongyu Li, Zhihui Wang, Zhen Fu, Mingming Yan, Nanjin Wu, Hongyan Wu, Ping Yin

BMJ Open Apr 2018, 8 (4) e020533; DOI: 10.1136/bmjopen-2017-020533
Leisure-time physical activity and circulating 25-hydroxyvitamin D levels in cancer survivors: a cross-sectional analysis using data from the US National Health and Nutrition Examination Survey
Lin Yang, Adetunji T Toriola

BMJ Open Jul 2017, 7 (7) e016064; DOI: 10.1136/bmjopen-2017-016064
Associations between excessive adiposity and seroprevalence of herpes simplex virus type 1 and type 2 among US adults: a population-based age–period–cohort analysis
Su-Hsun Liu, I-Shiang Tzeng, Tsung-Han Hsieh, Yhu-Chering Huang

BMJ Open Oct 2016, 6 (10) e012571; DOI: 10.1136/bmjopen-2016-012571
Ultra-processed foods and added sugars in the US diet: evidence from a nationally representative cross-sectional study
Eurídice Martínez Steele, Larissa Galastri Baraldi, Maria Laura da Costa Louzada, Jean-Claude Moubarac, Dariush Mozaffarian, Carlos Augusto Monteiro

BMJ Open Jan 2016, 6 (3) e009892; DOI: 10.1136/bmjopen-2015-009892

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