Perinatal outcomes in Finnish twins: a retrospective study

Table 1 Factors affecting perinatal mortality, binomial regression analysis

Variable	Estimate	OR	OR CI	p-value
Model 1*
Twin B vs twin A	0.312	1.366	1.054–1.774	0.019
Advancing time	−0.038	0.963	0.951–0.975	< 0.001
< 1500 g	0.008	1.008	1.002–1.015	0.019
1500-2499 g	−0.002	0.998	0.996–1.001	0.277
≥ 2500 g	−0.000	1.000	0.998–1.001	0.675
Model 2
Twin B vs twin A	0.230	1.258	1.089–1.455	0.002
Advancing time	−0.033	0.967	0.956–0.979	< 0.001
< 1500 g	0.010	1.010	1.003–1.017	0.006
NICU stay	−0.002	0.998	0.997–1.000	0.052
Model 3
Twin B vs twin A	0.307	1.359	1.177–1.571	< 0.001
Advancing time	−0.042	0.959	0.948–0.969	< 0.001
Delivery: Vaginal attempt	−0.001	0.999	0.997–1.002	0.546
Delivery: Cesarean section	−0.002	0.998	0.996–1.001	0.250
Delivery: Combination delivery	0.002	1.002	0.994–1.010	0.622

ISSN: 1471-2393