Table 2

Comparisons of baseline characteristics between quitters and continuous smokers

Continuous smokers n=94p Value
Male sex122 (66.7)58 (61.7)0.414
Age, year62.9±11.557.2±12.6<0.001
Cigarettes smoked daily, N21.9±11.124.9±14.30.059
Duration of smoking, year40.4±12.834.9±12.8<0.001
Brinkman Index889.6±580.1850.3±545.40.586
TDS score7.7±1.67.8±1.60.569
Exhaled CO, ppm11.6±8.118.2±10.3<0.001
Body mass index, kg/m223.3±4.223.0±5.00.579
FEV1, % predicted74.9±19.977.3±20.90.360
FVC, % predicted82.1±18.284.4±15.60.291
FEV1/FVC, %73.7±12.974.6±14.10.623
Diseases (self-reported)
 Mental disorder40 (21.9)39 (41.5)<0.001
 Diabetes mellitus34 (18.6)15 (16.0)0.586
 Cardiovascular disease45 (24.6)15 (16.0)0.092
 COPD30 (16.4)19 (20.2)0.430
 Bronchial asthma24 (13.1)10 (10.6)0.548
 Cancer15 (8.2)7 (7.5)0.826
SGRQ score
  • Data are presented as number (%) or mean±SD.

  • COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; SGRQ, St. George's Respiratory Questionnaire; TDS, Tobacco Dependence Screener test.