Research Article
The Impact of Tobacco Smoke Exposure on Wheezing and Overweight in 4–6-Year-Old Children
Table 2
Distribution of variables according to children’s overweight status and unadjusted effects as odds ratios (OR) and 95% confidence intervals (CI).
| Risk factors | Overweight yes (%) | Overweight no (%) | Odds ratios** 95% CI |
| Mothers’ age at childbirth (years) | | | | <30 | 79 (7.9%) | 916 (92.1%) |
1.25 (0.81–1.91) | 31 and more | 32 (6.5%) | 426 (93.5%) | 1 | Maternal education level | | | | Low (10 or less years)* | 36 (11.7%) | 271 (88.3%) | 2.00 (1.30–3.00) | Medium, high (>10 years) | 75 (6.3%) | 1107 (93.7%) | 1 | Maternal active smoking* | | | | No | 88 (6.8%) | 1212 (93.2%) | 1 | Yes | 23 (12.2%) | 166 (87.8%) | 1.91 (1.17–3.11) | Maternal smoking during pregnancy* | | | | No | 94 (6.8%) | 1282 (93.2%) | 1 | Yes | 17 (15.0%) | 96 (85.0%) | 2.42 (1.38–4.21) | Maternal second-hand smoking | | | | No | 68 (7.1%) | 888 (92.9%) | 1 | Yes | 43 (8.1%) | 490 (91.9%) | 1.15 (0.77–1.71) | Children’s sex | | | | Male* | 65 (8.8%) | 673 (91.2%) | 1.48 (1.00–2.19) | Female | 46 (6.1%) | 705 (93.9%) | 1 | Breastfeeding | | | | No | 10 (10.1%) | 89 (89.9%) | 1.43 (0.72–2.84) | Yes | 101 (7.3%) | 1289 (92.7%) | 1 | Paracetamol use during the first year of life | | | | No | 26 (5.7%) | 427 (94.3%) | 1 | Yes | 85 (8.2%) | 951 (91.8%) | 1.47 (0.93–2.31) | Antibiotic use during the first year of life | | | | No | 66 (6.8%) | 908 (93.2%) | 1 | Yes | 45 (8.7%) | 470 (91.3%) | 1.32 (0.89–1.96) | Birth weight* | | | | <2500 g | 6 (6.8) | 82 (93.2%) | 1.17 (0.48–2.84) | 2500–3500 g | 43 (5.9%) | 688 (94.1%) | 1 | >3500 g | 62 (9.3%) | 608 (90.7%) | 1.63 (1.09–2.44) | Watching TV | | | | ≤1 h/day | 36 (6.1%) | 558 (93.9%) | 1 | >1 h/day | 75 (8.4%) | 820 (91.6%) | 1.42 (0.94–2.14) | Time spent at the computer* | | | | ≤1 h/day | 72 (6.3%) | 1066 (93.7%) | 1 | >1 h/day | 39 (11.1%) | 312 (88.9%) | 1.58 (2.84–6.47) |
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**Unadjusted associations are presented as overweight odds ratio (OR) with 95% confidence intervals of univariate analysis.
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