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. 2020 Feb 18;128(2):027007. doi: 10.1289/EHP5337

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EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

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Figure 2 is a flow chart with six levels. The first level has subjects of birth cohorts 1978 to 2002 residing in the 21 municipalities originally included in the Red Area n equals 33793. The second level has two parts: subjects who agreed to participate in the health surveillance program n equals 21467 and subjects who did not agree to participate in the health surveillance program n equals 12326. The third level has two parts: subjects with complete reports n equals 20549 and subjects with incomplete reports n equals 918. The fourth level has two parts: subjects aged 14 to 39 years at recruitment n equals 19898 and subjects 40 years of age at recruitment n equals 651. The fifth level has subjects with at least 1 year of residence in the Red Area by 2013 n equals 18345 and subjects with less than 1 year of residence in the Red Area by 2013 n equals 1553. The sixth level has final study population n equals 18122 and subjects with missing values for any potential predictor n equals 223. — Flow chart of the inclusion–exclusion process.