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Table 1 Characteristics of the participants (% and mean ± SD)

From: Persistent Chlamydia Pneumoniae serology is related to decline in lung function in women but not in men. Effect of persistent Chlamydia pneumoniae infection on lung function

  Men
(n = 500)
Women
(n = 609)
p-value All
(n = 1109)
Age at baseline 27.9 ± 5.7 27.4 ± 5.4 0.15 27.6 ± 5.6
Smoking history (%)    < 0.0001  
   never 41.8 41.5   41.7
   ex 23.6 14.1   18.4
   current 34.6 44.3   40.0
Pack years between surveys in current smokers 14.7 ± 13.1 17.0 ± 12.5 0.04 15.8 ± 12.9
BMI kg/m2 23.2 ± 2.8 22.0 ± 3.1 < 0.0001 22.5 ± 3.0
Change in BMI over 10 yrs. 1.5 ± 1.2 1.9 ± 1.3 < 0.0001 1.7 ± 1.3