Table 3 Characteristics of the study population by exposure to tobacco products, either through maternal smoking in pregnancy or environmental tobacco smoke in lifetime.
From: Prenatal and postnatal tobacco smoke exposure and respiratory health in Russian children
Characteristic | Exposed, N (%) | Reference, N (%) | Total, N(%) |
|---|---|---|---|
Total | 3790 (64.5) | 2084 (35.5) | 5874 |
Age | |||
8 | 561 (14.8) | 317 (15.2) | 878 (14.9) |
9 | 1268 (33.5) | 675 (32.4) | 1943 (33.1) |
10 | 1216 (32.1) | 654 (31.4) | 1870 (31.8) |
11 | 647 (17.1) | 396 (19.0) | 1043 (17.8) |
12 | 98 (2.6) | 42 (2.0) | 140 (2.4) |
Gender, boy | 1918 (50.6) | 1053 (50.5) | 2971 (50.6) |
Mother's education | |||
Higher | 636 (16.9) | 492 (23.7) | 1128 (19.3) |
Incomplete higher or college | 2070 (55.0) | 1102 (53.2) | 3172 (54.4) |
Secondary | 1056 (28.1) | 479 (23.1) | 1535 (26.3) |
Parental asthma | 66 (1.8) | 41 (2.0) | 107 (1.8) |
Low birth weight ( ≤ 2500 g) | 248 (6.9) | 109 (5.5) | 357 (6.4) |
Premature birth ( < 37 weeks) | 390 (10.5) | 172 (8.3) | 562 (9.7) |
Income below average | 2404 (63.9) | 1259 (60.8) | 3663 (62.8) |
Others sleeping in the same room with child | 2760 (73.5) | 1490 (71.9) | 4250 (72.9) |
Furry or feathery pets | 2421 (65.6) | 1247 (61.4) | 3668 (64.1) |