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Table 3 Characteristics of the study population by thyroid disease status

From: Modeled nitrate levels in well water supplies and prevalence of abnormal thyroid conditions among the Old Order Amish in Pennsylvania

  Normal Subclinical Hyperthyroidism Clinical Hyperthyroidism Subclinical Hyperthyroidism Clinical Hyperthyroidism Total
Overall (N, %) 2224 (87.5%) 25 (1.0%) 10 0.4%) 228 (9.0%) 56 (2.2%) 2,543
Male (%) 48.6 32.0 30 40.8 41.1 47.5
Age in years (mean) 48.9 56.9 56.2 59.2 56.7 50.1
BMI Males kg/m2 (mean) 26.6 27.2 22.3 26.7 27.5 26.6
BMI Females kg/m2 (mean) 27.5 27.5 27.1 28.5 29.2 29.2
Ever Smoker (%)* 22.3 16.7 33.3 26.5 26.3 22.7
  1. Includes persons who reside in Lancaster, Chester, or Lebanon Counties and excludes persons younger than 18 or who report use of thyroid medications.
  2. *smoking status is based on 45.8% of the study population