Table 3 Second-hand smoke (SHS) exposure in ECRHS I-II, ECRHS II-III and ECRHS I-IIIa
Changes between ECRHS I and II | Changes between ECRHS II and III | Changes between ECRHS I and III | |
|---|---|---|---|
No SHS exposure at both examinations | 54.4 (1639/3011) | 74.5 (2243/3011) | 58.9 (1774/3011) |
No SHS exposure at first examination but at second examination | 6.9 (208/3011) | 2.5 (74/3011) | 2.4 (73/3011) |
SHS exposure at first examination but not at second examination | 22.5 (678/3011) | 18.4 (553/3011) | 33.9 (1022/3011) |
SHS exposure at both examinations | 16.1 (486/3011) | 4.7 (141/3011) | 4.7 (142/3011) |