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Table 3 Serum 25 (OH) D concentrations in relation to clinical outcomes of IVF: univariate and multivariate logistic analysis

From: Effect of vitamin D status on normal fertilization rate following in vitro fertilization

Outcomes Group1 Group2 Group 3 Group 4
Number of cycles 216 210 211 211
Clinical pregnancy rate (%) 59.2% 57.9% 60.0% 63.5%
Univariate (OR(95%CI),P) 1 0.947 (0.567–1.581),0.836 1.035 (0.618–1.734),0.895 1.200 (0.718–2.006),0.486
Multivariatea (OR(95%CI),P) 1 1.007 (0.578–1.752),0.981 0.988 (0.562–1.737),0.968 1.173 (0.674–2.043),0.573
Implantation rate (%) 42.9% 41.4% 44.5% 43.9%
Univariate (OR(95%CI),P) 1 0.941 (0.651–1.361),0.747 1.069 (0.741–1.541),0.722 1.043 (0.726–1.499),0.818
Multivariatea (OR(95%CI),P) 1 0.958 (0.647–1.419),0.931 1.024 (0.690–1.518),0.907 1.021 (0.693–1.506),0.915
Abortion rate (%) 8.5% 10.0% 2.8% 8.8%
Univariate (OR(95%CI),P) 1 1.398 (0.459–4.260),0.556 0.637 (0.172–2.362),0.500 1.373 (0.463–4.070),0.567
Multivariatea (OR(95%CI),P) 1 1.319 (0.365–4.768),0.673 0.732 (0.171–3.126)0.673 1.302 (0.373–4.544),0.679
Live birth rate (%) 53.3% 48.8% 56.7% 55.6%
Univariate (OR(95%CI),P) 1 0.833 (0.502–1.381),0.478 1.144 (0.688–1.903),0.604 1.094 (0.662–1.807),0.726
Multivariatea (OR(95%CI),P) 1 0.876 (0.507–1.515),0.636 1.089 (0.624–1.901),0.765 1.078 (0.626–1.856),0.787
  1. Values are significantly different between groups (P < 0.05)
  2. aAdjusted for maternal age, BMI, AMH, type of infertility, previous pregnancy, seasons when samples were taken, COH protocol, duration of stimulation, number of oocytes retrieved, endometrial thickness, serum progesterone levels on the day of hCG and the number of embryo transferred