Table 1

Genetic, lifestyle, clinical, and sociodemographic characteristics of men with and without chronic bronchitis

Bronchitis n=485 No bronchitis n=2846 p Value
NS-phenotype in MNS blood group:
 Overall (%)13.617.00.073
 Among smokers (%)12.717.40.033
Lifestyle factors:
 Alcohol use:
  Abstention (%)12110.532
  Moderate (1–21 drinks/week) (%)5160<0.001
  More than moderate (22–35 drinks/week) (%)21190.145
  Heavy use (>35 drinks/day) (%)1610<0.001
 Low physical activity, <4 h/week (%)52470.088
 Smoking (%)8051<0.001
  Smokers only:
  Inhalation (%)8272<0.001
  Amount smoked (g/day)17.2 (8.0)14.9 (7.8)<0.001
Clinical or paraclinical variables:
 Peak flow (l/min)412 (125)504 (87)<0.001
 Height (cm)173 (6)174 (6)<0.001
 Weight (kg)76 (12)78 (11)0.009
 Systolic BP (mm Hg)118 (16)122 (17)<0.001
 Diastolic BP (mm Hg)71 (13)73 (12)<0.001
 Serum cotinine (ng/ml)327 (227)197 (234)<0.001
  Smokers only:
  Serum cotinine (ng/ml)392 (194)343 (201)<0.001
Other characteristics:
 Low social class (classes IV and V) (%)5951<0.001
 Retired (%)5447.50.003
 Age (y, mean (SD))63.2 (5.2)62.8 (5.2)0.175
  • Values are means (SD) or frequencies (%). p Values are of Student's t test (for continuous variables other than peak flow), Mann-Whitney rank sum analysis (for peak flow), or Yates corrected χ2 analysis (for categorical variables).