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Table 2 Prevalence of respiratory symptoms and diseases and distribution of lung function parameters and confounding variablesa

From: Second-hand smoke exposure in adulthood and lower respiratory health during 20 year follow up in the European Community Respiratory Health Survey

  ECRHS I ECRHS II ECRHS III
SHS exposed (n = 1164) SHS non-exposed (n = 1847) SHS exposed (n = 694) SHS non-exposed (n = 2317) SHS exposed (n = 215) SHS non-exposed (n = 2796)
Sex, female 52.0 (605/1164) 55.5 (1025/1847) 51.9 (360/694) 54.8 (1270/2317) 58.6 (126/215) 53.8 (1504/2796)
Age, years 33.8 (7.5) 35.1 (6.9) 43.5 (7.3) 43.3 (7.1) 53.8 (6.9) 54.7 (7.2)
Age completed full time education
  < 17 years 19.4 (212/1093) 13.8 (232/1686) 24.7 (160/649) 13.3 (284/2130) 29.6 (59/199) 14.9 (385/2580)
 17–20 years 39.1 (427/1093) 33.6 (567/1686) 39.8 (258/649) 34.6 (736/2130) 39.7 (79/199) 35.5 (915/2580)
  > 20 years 41.5 (454/1093) 52.6 (887/1686) 35.6 (231/649) 52.1 (1110/2130) 30.7 (61/199) 49.6 (1280/2580)
Height, cm 170.4 (9.8) 170.6 (9.5) 169.6 (10.0) 170.9 (9.5) 167.2 (10.2) 170.1 (9.7)
Weight, kg 70.2 (14.0) 68.7 (13.2) 74.5 (15.0) 73.6 (14.9) 77.7 (14.2) 77.6 (16.1)
Paternal smoking 63.3 (714/1128) 58.2 (1059/1819) 67.2 (452/673) 58.1 (1321/2274) 72.9 (153/210) 59.2 (1620/2737)
Maternal smoking 20.5 (237/1155) 20.3 (373/1834) 17.8 (123/690) 21.2 (487/2299) 18.2 (39/214) 20.6 (571/2775)
Allergic sensitisation, IgE 26.5 (267/1007) 33.8 (538/1593) 26.0 (151/581) 32.4 (654/2019) 28.4 (50/176) 31.1 (755/2424)
Dust/fumes exposure 41.8 (484/1159) 35.7 (653/1828) 42.7 (296/694) 39.0 (904/2316) 38.5 (77/200) 22.1 (572/2583)
Ex-smoker 31.2 (363/1164) 28.7 (531/1847) 33.3 (231/694) 29.5 (684/2317) 31.6 (68/215) 29.0 (810/2796)
Smoking status
 Never smoker 69.2 (801/1158) 71.4 (1316/1844) 67.9 (463/682) 73.0 (1633/2236) 70.0 (147/210) 73.3 (1986/2709)
 Ex-smoker with < 15 pack-years 23.2 (269/1158) 22.3 (412/1844) 21.6 (147/682) 21.2 (474/2236) 16.2 (34/210) 20.1 (544/2709)
 Ex-smoker with > = 15 pack-years 7.6 (88/1158) 6.3 (116/1844) 10.6 (72/682) 5.8 (129/2236) 13.8 (29/210) 6.6 (179/2709)
Asthma, doctor-diagnosed 7.1 (82/1160) 7.4 (136/1846) 10.4 (72/694) 10.8 (250/2312) 15.0 (32/213) 13.8 (385/2792)
Chronic bronchitis 1.4 (16/1162) 1.3 (24/1846) 2.3 (16/693) 1.2 (27/2314) 4.2 (9/215) 2.1 (59/2789)
COPD, FEV1/FVC < 0.7 2.7 (29/1078) 3.4 (59/1731) 2.5 (16/630) 4.4 (89/2042) 9.3 (18/193) 10.8 (264/2448)
COPD, FEV1/FVC < GLI LLN 4.6 (50/1077) 4.5 (78/1731) 2.2 (14/629) 3.8 (77/2038) 5.7 (11/193) 5.8 (142/2445)
Asthma symptom score
 0 74.8 (866/1157) 76.0 (1392/1831) 67.9 (468/689) 75.0 (1723/2298) 65.6 (137/209) 72.7 (1974/2714)
 1 14.1 (163/1157) 13.0 (238/1831) 18.3 (126/689) 13.6 (313/2298) 16.7 (35/209) 16.8 (455/2714)
 2 5.7 (66/1157) 5.4 (99/1831) 6.7 (46/689) 5.9 (136/2298) 7.7 (16/209) 6.0 (163/2714)
 3 2.9 (33/1157) 2.8 (51/1831) 3.5 (24/689) 3.1 (72/2298) 4.8 (10/209) 2.5 (67/2714)
 4 1.6 (18/1157) 1.6 (30/1831) 2.5 (17/689) 1.6 (36/2298) 3.3 (7/209) 1.0 (26/2714)
 5 1.0 (11/1157) 1.1 (21/1831) 1.2 (8/689) 0.8 (18/2298) 1.9 (4/209) 1.1 (29/2714)
Dyspnoea 4.6 (54/1163) 4.9 (90/1847) 6.5 (45/694) 5.2 (120/2310) 9.0 (19/211) 5.2 (142/2743)
Cough 33.6 (390/1159) 29.7 (547/1842) 35.3 (244/692) 31.7 (733/2312) 40.1 (85/212) 33.7 (936/2778)
Sputum 11.2 (129/1153) 10.1 (185/1827) 12.0 (83/692) 10.0 (230/2298) 15.2 (32/211) 10.9 (302/2769)
FEV1, ml 3800 (824) 3781 (835) 3522 (805) 3595 (819) 3028 (756) 3123 (778)
FVC, ml 4573 (1032) 4591 (1058) 4306 (1000) 4458(1030) 3904 (995) 4063 (993)
FEV1/FVC, % 83.5 (6.7) 82.8 (6.5) 82.1 (5.9) 80.9 (6.1) 77.6 (5.6) 77.0 (5.7)
  1. astratified by exposure to second-hand smoke (SHS) and presented as % (n/N) for categorical variables and mean (SD) for continuous variables, respectively