Characteristic | Univariate analysis | Multivariate analysis | ||||
---|---|---|---|---|---|---|
ORb | 95% CI | p value | ORb | 95% CI | p value | |
Age (years) | ||||||
≤ 24 | 2.0 | 1.2–3.4 | 0.007 | 2.1 | 1.2–3.7 | 0.009 |
25–34a | ||||||
≥ 35 | 1.0 | 0.5–2.0 | 0.957 | 0.8 | 0.4–1.5 | 0.437 |
Monthly income (Sri Lankan Rupees) | ||||||
≤ 24,000 | 3.4 | 1.7–6.7 | 0.000 | 2.0 | 0.9–4.2 | 0.072 |
25–49,000 | 2.4 | 1.2–4.6 | 0.009 | 1.9 | 1.0–3.8 | 0.049 |
≥ 50000a | ||||||
Educational level of the mother | ||||||
Up to secondary school | 2.6 | 1.6–4.4 | 0.000 | 2.0 | 1.1–3.6 | 0.019 |
Above secondary schoola | ||||||
Parity | ||||||
Primiparousa | ||||||
Multiparous | 2.0 | 1.3–3.2 | 0.002 | 2.4 | 1.4–3.9 | 0.001 |