Association between caesarean delivery and the occurrence of children’s asthma after controlling for gestational age, children’s and parental characteristics
| Adjusted OR | 95% CI | Adjusted OR | 95% CI | Adjusted OR | 95% CI | |
| Caesarean delivery | 1.16 | 1.03 to 1.30 | 1.11 | 0.98 to 1.25 | 1.11 | 0.98 to 1.25 |
| Gestational age (reference: 39–41 weeks) | ||||||
| <37 weeks | 1.27 | 1.03 to 1.56 | 1.23 | 1.00 to 1.52 | ||
| 37 weeks | 1.18 | 0.99 to 1.41 | 1.17 | 0.98 to 1.40 | ||
| 38 weeks | 1.19 | 1.04 to 1.37 | 1.19 | 1.03 to 1.36 | ||
| ≧42 weeks | 1.98 | 0.84 to 4.65 | 2.05 | 0.87 to 4.84 | ||
| Gender, male | 1.40 | 1.25 to 1.57 | 1.39 | 1.24 to 1.56 | 1.40 | 1.24 to 1.57 |
| First-born child | 1.23 | 1.09 to 1.38 | 1.26 | 1.12 to 1.42 | 1.27 | 1.13 to 1.44 |
| Maternal age at birth of child (reference: ≧35 years) | ||||||
| <25 years | 0.90 | 0.71 to 1.15 | 0.90 | 0.71 to 1.15 | 0.88 | 0.69 to 1.12 |
| 25–29 years | 1.14 | 0.95 to 1.36 | 1.14 | 0.96 to 1.36 | 1.13 | 0.94 to 1.34 |
| 30–34 years | 1.03 | 0.88 to 1.22 | 1.04 | 0.88 to 1.23 | 1.02 | 0.87 to 1.21 |
| Maternal education levels (reference: college or above) | ||||||
| ≤Compulsory school | 0.67 | 0.53 to 0.85 | 0.67 | 0.53 to 0.85 | 0.68 | 0.54 to 0.86 |
| Senior high school | 0.72 | 0.61 to 0.85 | 0.72 | 0.61 to 0.85 | 0.72 | 0.61 to 0.86 |
| Junior college | 0.81 | 0.69 to 0.95 | 0.81 | 0.69 to 0.95 | 0.81 | 0.69 to 0.96 |
| Family monthly income (NTD; reference: >100 000) | ||||||
| <30 000 | 0.67 | 0.52 to 0.86 | 0.66 | 0.52 to 0.85 | 0.67 | 0.53 to 0.86 |
| 30 000–100 000 | 0.87 | 0.74 to 1.02 | 0.87 | 0.74 to 1.02 | 0.88 | 0.75 to 1.04 |
| Parental asthma history (reference: no) | 3.62 | 2.88 to 4.55 |
Logistic regression was used for analysis.
NTD, New Taiwan Dollar; US$1≒NT$30.