Table 3. Risk factors of preterm birth and infant death.

		Preterm birth	Infant death
Independent variables		Adjusted odds ratio (95% CI)	Adjusted odds ratio (95% CI)
Age of mother at preceding birth	18–34 years	reference	reference
	< 18 years	1.38 (0.59–3.24)	0.17 (0.02–1.52)
	≥ 35 years	0.65 (0.27–1.59)	1.07 (0.33–3.48)
Maternal education–less than 12 years		0.73 (0.48–1.11)	1.81 (0.98–3.44)
Number of pregnancies	≤ 3	reference	reference
	4–5	0.74 (0.48–1.14)	1.45 (0.70–2.98)
	≥ 6	0.72 (0.45–1.15)	1.32 (0.62–2.84)
Maternal employment		0.79 (0.41–1.51)	1.18 (0.40–3.55)
Residence inside camp		0.99 (0.69–1.43)	1.04 (0.57–1.89)
Consanguinity		1.16 (0.80–1.68)	2.41 (1.35–4.30)
Risk classification preceding pregnancy	normal	reference	reference
	alert	1.82 (1.19–2.78)	1.61 (0.79–3.29)
	high	2.94 (1.86–4.64)	3.09 (1.46–6.53)
Twin/triplet pregnancy		9.54 (4.46–20.38)	1.32 (0.36–4.83)
Birth-interval below 24 months		0.99 (0.69–1.42)	3.98 (2.17–7.30)
Sex preceding child (female)		0.86 (0.61–1.22)	1.65 (0.93–2.94)
Preterm birth (< 37 weeks)			9.88 (3.98–24.85)
Low birth weight (< 2500 grams)			3.20 (0.93–11.04)
Preterm birth by low birth weight (interaction)			1.20 (0.24–5.60)

Hosmer and Lemeshow test and classification preterm birth: p = 0.98, 75.0%; infant death p = 0.09, 82.7%.