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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