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Table 2 Respiratory symptom frequency grouped by SHS exposure at home for all participants and by gender

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)

Occasionally (N = 248)

Daily (N = 256)

Never (N = 4656)

Occasionally (N = 140)

Daily (N = 148)

Never (N = 3690)

Occasionally (N = 108)

Daily (N = 108)

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

n (%)

Ever had symptom

 Asthma

1044 (13)

36 (15)

37 (15)

597 (13)

22 (16)

21 (14)

447 (12)

14 (13)

16 (15)

 Physician-diagnosed asthma

910 (11)

34 (14)

32 (13)

515 (11)

20 (14)

18 (12)

395 (11)

14 (13)

14 (13)

Wheezing

1774 (21)

55 (22)

53 (21)

1023 (22)

29 (21)

38 (26)

751 (20)

26 (24)

15 (14)

Chronic cough

1546 (19)

55 (22)

50 (20)

928 (20)

28 (20)

31 (21)

618 (17)

27 (25)

19 (18)

 Productive cough

924 (11)

29 (12)

46 (18)

535 (12)

19 (14)

28 (19)

389 (11)

10 (9)

18 (17)

 Nasal symptoms without cold

3580 (43)

96 (39)

112 (44)

2055 (44)

53 (38)

69 (47)

1525 (41)

43 (40)

43 (40)

Past 12 months

 Use of asthma medication

569 (7)

19 (8)

17 (7)

333 (7)

14 (10)

14 (10)

236 (6)

5 (5)

3 (3)

 Wheezing

1288 (15)

34 (14)

45 (18)

748 (16)

26 (19)

32 (22)

540 (15)

8 (7)

13 (12)

 Nocturnal chest tightness

970 (12)

39 (16)

30 (15)

615 (13)

26 (19)

28 (19)

355 (10)

13 (12)

11 (10)

 Nocturnal cough

1781 (21)

55 (22)

62 (24)

1220 (26)

35 (25)

44 (30)

561 (15)

20 (19)

18 (17)

 Asthma attack

312 (4)

14 (6)

14 (6)

201 (4)

12 (9)

10 (7)

111 (3)

2 (2)

4 (4)

 Dyspnoea while wheezing

939 (11)

29 (12)

32 (13)

547 (12)

19 (14)

24 (16)

392 (11)

10 (9)

8 (7)

 Wheezing without cold

844 (10)

28 (11)

30 (12)

476 (10)

18 (13)

23 (16)

368 (10)

10 (9)

7 (7)

 Nocturnal dyspnoea

477 (6)

18 (7)

28 (11)

286 (6)

13 (9)

18 (12)

191 (5)

5 (5)

10 (9)

 Mean symptom score (SD)a

0.86 (1.6)

0.95 (1.8)

1.04 (1.8)

0.95 (1.7)

1.2 (2.0)

1.3 (1.9)

0.75 (1.5)

0.68 (1.4)

0.69 (1.5)

  1. *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
  2. aSD: standard deviation