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Table 1 Population characteristics of the 8850 Telemark study respondents who had never smoked

From: Exposure to second-hand tobacco smoke and respiratory symptoms in non-smoking adults: cross-sectional data from the general population of Telemark, Norway

  All participants N = 8850 Female N = 4944 Male N = 3906
N (%) N (%) N (%)
Age (years)
 16–30 3575 (40.4) 1992 (40.3) 1583 (40.5)
 31–40 2132 (24.1) 1252 (25.3) 880 (22.5)
 41–50 3143 (35.5) 1700 (34.4) 1443 (36.9)
Education
 Elementary school and additional 1–2 years (low) 1430 (16.2) 759 (15.4) 671 (17.2)
 Upper secondary or certificate (medium) 3168 (35.1) 1536 (31.1) 1632 (41.8)
 University (≥4 years) (high) 3905 (44.1) 2483 (50.2) 1422 (36.4)
 Other or missing 347 (3.9) 166 (3.4) 181 (4.6)
Parental smoking during childhood 4557 (51.5) 2558 (51.7) 1999 (51.2)
Occupational exposure to VGDFa 3443 (38.9) 1313 (26.6) 2130 (54.5)
Exposure to mould or damp at homeb 330 (3.7) 200 (4.0) 130 (3.3)
  1. aSelf-reported occupational exposure to vapour, gas, dust or fumes
  2. bSelf-reported exposure to mould or damp during the past 12 months