Table 1.

Demographic information for study subjects

No. subjects, n (%)Gender (% male)Mean age* (95% CI)Mean CPD (95% CI)
Study 1
    Regular23 (20.0)6145.6 (40.8-50.3)23.6 (21.0-26.2)
    Light58 (50.4)5045.4 (42.7-48.2)23.4 (22.1-24.7)
    Ultralight34 (29.6)3846.7 (43.4-50.1)23.8 (21.7-26.0)
Study 2
    Regular24 (40.0)9155.6 (51.3-59.9)32.0 (27.3-36.7)
    Light22 (36.7)9059.8 (55.3-62.0)26.0 (22.0-29.9)
    Ultralight14 (23.3)9362.6 (58.3-67.0)31.6 (20.5-42.6)
Pooled
    Regular47 (26.9)7250.5 (47.0-54.0)27.9 (25.0-30.8)
    Light80 (45.7)5949.1 (46.4-51.7)24.1 (22.6-25.6)
    Ultralight48 (27.4)5451.4 (48.0-53.1)26.1 (22.5-30.0)
  • * Data were missing for four subjects in study 2.