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Table 2 Annual decline rate in FEV1% pred/yr in men and women according to smoking status

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 Former smokers Current smokers
   Women Men Difference* Women Men Difference* Women Men Difference*
Viegi et al,22 2001 32 NA NA NA -0.12 -0.21 0.09 0.12 0.13 -0.01
C hinn et al,12 2005 34 0.78 0.76 0.02 0.91 0.76 0.15 0.88 0.84 0.04
Rijcken et al,13 1995 39 0.83 0.96 -0.13 0.89 0.87 0.02 0.97 1.11 -0.14
Jedrychow ski et al,14 1986 40 1.35 1.13 0.22 NA NA NA 1.41 1.46 -0.05
James et al,15 2005 42 0.87 0.91 -0.04 0.99 1.01 -0.02 1.05 1.22 -0.17
Tashkin et al,16 1984 46 1.51 1.70 -0.19 1.36 1.65 -0.29 1.97 2.15 -0.18
Sherrill et al,17 1996 48 0.50 0.44 0.06 0.49 0.85 -0.36 0.66 0.49 0.17
Connett et al,23 2003 48 NA NA NA 0.37 0.07 0.30 1.20 1.05 0.15
Xu et al,18 1992 49 1.08 0.98 0.10 1.11 0.89 0.22 1.42 1.37 0.05
  1. Each cell represents annual change in FEV1% pred/yr, unless otherwise indicated.
  2. Symbols: *:A positive number denotes a larger decline in FEV1% pred in women; a negative number denotes a large decline in FEV1% pred in men; †: Never smokers and former smokers were combined as non-smokers in the article since they did not differ in FEV1% pred decline.