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Table 3 Annual decline rate in FEV1% pred/yr for female and male current smokers stratified by the daily amount of cigarette consumption

From: Female smokers beyond the perimenopausal period are at increased risk of chronic obstructive pulmonary disease: a systematic review and meta-analysis

Source Average age at baseline (year) Never smokers < 15 g/day 15 g/day
   Women Men Difference* Women Men Difference* Women Men Difference*
Viegi et al,22 2001 32 NA NA NA 0.08 0.12 -0.04 0.22 0.15 0.07
James et al,15 2005 42 0.87 0.91 -0.04 0.97 1.12 -0.15 1.13 1.26 -0.13
Xu et al,18 1992 49 1.08 0.98 0.10 1.16 0.97 0.19 1.51 1.44 0.07
Vestbo et al,1 1996 53 1.00 0.83 0.17 1.23 0.98 0.25 1.32 1.22 0.10
Total -- 0.99 0.91 0.08 1.10 0.95 0.15 1.35 1.23 0.12
  1. Each cell represents annual change in FEV1% pred, unless otherwise indicated.
  2. Symbols: *: A positive number denotes a larger decline in FEV1% pred in women; a negative number denotes a larger decline in FEV1% pred in men.