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Table 1 Demographic and respiratory health characteristics of the study population (N = 576)

From: Occupation, smoking, and chronic obstructive respiratory disorders: a cross sectional study in an industrial area of Catalonia, Spain

  Men‡ Women‡
Total number 280 (100%) 296 (100%)
Age 20 to 44 years 135 (48.2%) 145 (49.0%)
Age 45 to 70 years 145 (51.8%) 151 (51.0%)
Current smokers 145 (51.8%) 62 (20.9%)
Ex-smokers 76 (27.1%) 31 (10.5%)
Never smokers 59 (21.1%) 203 (68.6%)
Chronic cough* 69 (24.6%) 24 (8.1%)
Chronic phlegm* 59 (21.1%) 10 (3.4%)
Wheezing during the last year 127 (45.4%) 93 (31.4%)
Wheezing apart from cold 92 (32.9%) 38 (12.8%)
Persistent wheezing† 32 (11.4%) 18 (6.1%)
Standing height (m)▫ 1.70 (0.08) 1.57 (0.07)
FEV1 (L)▫ 3.50 (0.88) 2.65 (0.59)
FEV1 to FVC ratio (%)▫ 75.5 (9.2) 79.1 (6.5)
MMEF (L/s)▫ 3.29 (1.46) 2.81 (0.95)
FEV1 <80% of predicted▫ 42 (16.7%) 21 (8.5%)
FEV1 to FVC ratio <70%▫ 49 (19.5%) 24 (9.8%)
FEV1<80% of predicted and FEV1/FVC<70%▫ 26 (10.4%) 10 (4.1%)
  1. ‡Number (%) or mean (standard deviation) are given
  2. ▫Number of subjects with lung function data: 497 (251 men and 246 women)
  3. * Most of the days at least three months a year during two consecutive years
  4. † Wheezing most of the days or night