Table 5.

Crude and adjusted odds ratios for the association between variables and perinatal adverse event

	OR (95% CI)	p value	aOR (95% CI)	p value
Sepsis	3.27 (3.00–3.55)	< 0.001	3.09 (2.83–3.36)	< 0.001
Maternal age ≥ 35 years	1.51 (1.46–1.56)	< 0.001	1.44 (1.39–1.50)	< 0.001
Urbanisation
Urban	Ref		Ref
Rural	0.92 (0.89–0.96)	< 0.001	0.94 (0.91–0.98)	0.004
Low insured income a	0.86 (0.84–0.88)	< 0.001	0.87 (0.84–0.89)	< 0.001
Comorbidities
Hypertension	1.77 (1.35–2.32)	< 0.001	1.04 (0.78–1.39)	0.791
Hyperlipidemia	1.54 (1.19–1.99)	0.001	0.99 (0.74–1.31)	0.934
Diabetes mellitus	2.15 (1.68–2.76)	< 0.001	1.37 (1.04–1.81)	0.025
Malignancy	1.43 (1.10–1.87)	0.009	1.28 (0.98–1.68)	0.071
Depression	1.00 (0.80–1.25)	1.000	0.93 (0.74–1.16)	0.502
Hyperthyroidism	1.28 (1.08–1.52)	0.004	1.18 (0.99–1.41)	0.054
Chronic liver diseases	1.66 (1.33–2.06)	< 0.001	1.48 (1.18–1.85)	0.001
Connective tissue disease	1.85 (1.37–2.48)	< 0.001	1.62 (1.20–2.19)	0.002
Gestational risks
Gestational diabetes	2.35 (2.14–2.58)	< 0.001	2.07 (1.88–2.27)	< 0.001
History of preterm delivery	4.31 (3.14–5.92)	< 0.001	3.11 (2.23–4.34)	< 0.001
Current smoker	4.74 (3.54–6.33)	< 0.001	4.49 (3.33–6.05)	< 0.001
Cervical insufficiency	3.54 (2.35–5.32)	< 0.001	2.49 (1.62–3.84)	< 0.001
Preeclampsia	2.63 (2.30–3.01)	< 0.001	2.17 (1.90–2.50)	< 0.001

^aInsured income lower than median income (17,280 New Taiwan dollars)