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Table 4 Multivariable logistic regression analysis for detecting prognostic factors regarding live birth rate

From: Serum progesterone levels greater than 32.5 ng/ml on the day of embryo transfer are associated with lower live birth rate after artificial endometrial preparation: a prospective study

Variables * B Odds ratio (95 % confidence interval ) P-value
Women’ age -0.04 0.95 (0.90–1.02) 0.16
Women’ body mass index 0.05 1.04 (0.89 − 0.12) 0.55
Cause of infertility
 Polycystic ovary syndrome   - Reference group -
 Male factor 0.32 1.37 (0.76–2.50) 0.28
 Tubal factor -0.49 0.60 (0.22–1.65) 0.32
 Unexplained factor 0.07 1.08 (0.41–2.79) 0.87
 Mixed factor (both male and female) − 0.32 0.72 (0.24–2.17) 0.56
Number of MII oocyte 0.07 1.07 (0.92–1.25) 0.34
Number of transferred embryos 0.15 1.16 (0.67-2.0) 0.57
Endometrial thickness on ET day 0.09 1.09 (0.90–1.31) 0.34
Progesterone value quartile (Q1) on ET day (< 19 ng/ml) -0.16 0.851 (0.42–1.70) 0.650
Progesterone value Q2 on ET day (19–29 ng/ml) - Reference group - -
Progesterone value Q3 on ET day (29–49 ng/ml) -0.65 0.51 (0.25–1.06) 0.073
Progesterone value Q4 on ET day (> 49 ng/ml) -1.41 0.24 (0.10–0.54) 0.001
Estradiol value Q1 on ET day (< 411 pg/m) - Reference group - -
Estradiol value Q2 on ET day (411–632 pg/ml) 0.60 1.82 (0.87–3.83) 0.11
Estradiol value Q3 on ET day (632–905 pg/ml) 0.33 1.39 (0.65–2.96) 0.38
Estradiol value Q4 on ET day (> 905 pg/ml) -0.43 0.65 (0.28–1.46) 0.30
  1. *statistically significant difference; p < 0.05