Mean ± SD of cotinine and lung function for men and women for the statistically significant post-hoc comparisons.

Note:
a = statistically significant (P<0.05) difference from previous measurement.
b = statistically significant (P<0.05) difference of T1 or T3 from TB.
c = statistically significant (P<0.05) difference between sexes for the same measurement.
Key: FVC: forced vital capacity; FEV1: forced expiratory volume in 1 second; %FEV1: percent predicted FEV1; PEF: peak expiratory flow; MEF75%, MEF50%, MEF25%: maximum expiratory flow when 75%, 50% and 25% of FVC remains in the lungs, respectively; MVV: maximum voluntary ventilation; RR: respiratory rate; TV: tidal volume; M: men; W: women.