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Table 3 Respiratory symptoms and exposure to SHS at home grouped by gender, adjusteda odds ratios

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

Symptoms or disease Exposure to second-hand tobacco smoke at home
All participants (N = 8850) Women (N = 4944) Men (N = 3906)
Never (N = 8346) Occasional (N = 248) Daily (N = 256) Occasional (N = 140) Daily (N = 148) Occasional (N = 108) Daily (N = 108)
Ever had symptom
 Asthma 1.0 1.2 (0.80–1.7) 1.1 (0.77–1.6) 1.2 (0.73–1.9) 1.1 (0.66–1.7) 1.1 (0.60–1.9) 1.1 (0.65–2.0)
 Physician-diagnosed asthma 1.0 1.3 (0.87–1.8) 1.1 (0.74–1.6) 1.3 (0.80–2.1) 1.1 (0.64–1.8) 1.2 (0.68–2.1) 1.1 (0.61–2.0)
 Wheezing 1.0 1.0 (0.76–1.4) 0.93 (0.68–1.3) 0.90 (0.59–1.4) 1.2 (0.82–1.8) 1.2 (0.78–1.9) 0.61 (0.35–1.1)
 Chronic cough 1.0 1.2 (0.91–1.7) 1.1 (0.77–1.5) 1.0 (0.65–1.5) 1.1 (0.71–1.6) 1.6 (1.04–2.6) 1.1 (0.64–1.8)
 Productive cough 1.0 0.93 (0.63–1.4) 1.5 (1.04–2.0) 1.0 (0.6–1.7) 1.4 (0.93–2.2) 0.80 (0.41–1.5) 1.5 (0.89–2.6)
 Nasal symptoms without cold 1.0 0.84 (0.65–1.1) 1.1 (0.82–1.4) 0.79 (0.56–1.1) 1.2 (0.82–1.6) 0.93 (0.62–1.4) 0.94 (0.63–1.4)
Past 12 months
 Use of asthma medication 1.0 1.0 (0.64–1.7) 0.8 (0.49–1.4) 1.2 (0.70–2.2) 1.1 (0.61–1.9) 0.67 (0.27–1.7) 0.38 (0.12–1.2)
 Wheezing 1.0 0.81 (0.56–1.2) 1.0 (0.75–1.5) 1.1 (0.69–1.7) 1.3 (0.83–1.9) 0.44 (0.21–0.92) 0.75 (0.42–1.4)
 Nocturnal chest tightness 1.0 1.3 (0.89–1.8) 1.2 (0.8–1.7) 1.3 (0.85–2.1) 1.3 (0.85–2.1) 1.2 (0.64–2.1) 0.93 (0.49–1.8)
 Nocturnal cough 1.0 0.98 (0.72–1.3) 1.1 (0.79–1.4) 0.86 (0.58–1.3) 1.1 (0.74–1.5) 1.2 (0.73–2.0) 1.1 (0.63–1.8)
 Asthma attack 1.0 1.4 (0.83–2.5) 1.3 (0.76–2.3) 1.8 (0.98–3.4) 1.3 (0.67–2.6) 0.61 (0.15–2.5) 1.3 (0.46–3.7)
 Dyspnoea while wheezing 1.0 0.96 (0.64–1.4) 0.99 (0.68–1.5) 1.1 (0.65–1.8) 1.3 (0.71–1.6) 0.77 (0.40–1.5) 0.59 (0.28–1.2)
 Wheezing without cold 1.0 1.0 (0.70–1.6) 1.0 (0.71–1.6) 1.2 (0.69–1.9) 1.4 (0.86–2.2) 0.87 (0.44–1.7) 0.38 (0.12–1.2)
 Nocturnal dyspnoea 1.0 1.2 (0.71–1.9) 1.8 (1.2–2.7) 1.4 (0.77–2.5) 1.8 (1.1–3.1) 0.79 (0.32–2.0) 0.93 (0.49–1.8)
 Symptom score   0.056 (−0.13–0.24) 0.13 (−0.050–0.31) 0.097 (−0.14–0.33) 0.21 (−0.010–0.44) −0.12 (−0.42–0.19) −0.11 (−0.42–0.19)
  1. aAdjusted for age, gender (in the unstratified analyses), education, ever exposure to vapour, gas, dust or fumes at work, mould or damp exposure at home in the past 12 months and parental SHS during childhood
  2. p-value based on comparison to Never category < 0.05 in bold; second-hand smoking at home: Daily: almost daily; Occasional: (1–4 times/week or 1–3 times/month
  3. bNegative binominal regression with regression coefficients and 95% confidence interval