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Table 4 Summary of multiple linear regression analyses for parameters associated with P/E2 ratio

From: Reproducibility and clinical significance of pre-ovulatory serum progesterone level and progesterone/estradiol ratio on the day of human chorionic gonadotropin administration in infertile women undergoing repeated in vitro fertilization cycles

Parameter B SE (B) β Sig.(p)
Age (years) 0.003 0.014 0.012 0.818
Body mass index (kg/m2) 0.023 0.020 0.055 0.256
Number of gonadotrophin ampoules used −0.009 0.005 −0.106 0.099
Duration of stimulation (day) 0.156 0.039 0.238 < 0.001
Number of oocytes retrieved −0.051 0.016 −0.166 0.002
Endometrium thickness (mm) −0.049 0.019 −0.123 0.012
R2 0.086    
F 6.396*    
  1. * P < 0.001