Table 3 Regression model estimating associated outcomes after matching stratified by age

Estimate (95% CI)

p-val

Estimate (95% CI)

p-val

OR (95% CI)

p-val

Age <35

N= 858

Embryo transfer day

0.09 (-0.05, 0.23)

0.23

0.05 (-0.09, 0.20)

0.48

0.83 (0.62, 1.09)

0.18

Propensity score

0.04 (-0.26, 0.35)

0.78

0.13 (-0.19, 0.45)

0.43

0.97 (0.53, 1.74)

0.91

35 ≤Age <37

N= 146

Embryo transfer day

0.17 (-0.23, 0.58)

0.40

0.21 (-0.23, 0.65)

0.35

1.13 (0.55, 2.32)

0.73

Propensity score

0.57 (-0.17, 1.31)

0.13

0.46 (-0.34, 1.27)

0.26

3.67 (0.99, 13.54)

0.05

37 ≤Age≤38

N= 100

Embryo transfer day

0.35 (-0.17, 0.86)

0.19

0.26 (-0.27, 0.80)

0.33

1.28 (0.52, 3.12)

0.59

Propensity score

1.11 (0.10, 2.12)

0.03

1.20 (0.16, 2.24)

0.02

4.64 (0.64, 33.43)

0.13

No. embryos frozen

-0.11 (-0.30, 0.08)

0.24

-0.12 (-0.33, 0.08)

0.23

0.88 (0.64, 1.22)

0.45