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Table 1 Baseline characteristics of cohorts

From: Folliculin mutations are not associated with severe COPD

  EOCOPD (n = 152) NETT (n = 345) NAS (n = 420)
Age, years 47.9 (4.7) 67.4 (6.0) 66.9 (8.6)
Male 41 (27.0%) 222 (64.4%) 420 (100%)
Pack-years of smoking 38.6 (20.8) 66.7 (30.9) 33.0 (22.8)
FEV1 (% Predicted)* 23.0 (9.8) 28.1 (7.5) 99.0 (12.0)
  1. EOCOPD = Boston Early-Onset COPD Study; NETT = National Emphysema Treatment Trial; NAS = Normative Aging Study
  2. Reported as mean (SD) or no. (%)
  3. *Reference values for NETT and EOCOPD from Crapo[42], for NAS from O'Connor[43].