Characteristics of the study sample

Parametersn = 826 patients
Age: Mean ± SD37.19 ± 14.30
Gender: n (%)Males351 (42.5%)
Females475 (57.5%)
Smoking: n (%)No699 (84.6%)
Yes127 (15.4%)
Smoking frequency among smokers: n (%)≤ 20 cigarettes/day73 (57.5%)
> 20 cigarettes/day54 (42.5%)
Medical condition: n (%)No639 (77.4%)
Yes187 (22.6%)
Long-term medications: n (%)No593 (71.8%)
Yes233 (28.2%)

SD: standard deviation