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Table 4 Effects of serum β-hCG levels on pregnancy outcomes by logistic regression analysis

From: Possibility of live birth in patients with low serum β-hCG 14 days after blastocyst transfer

   95% Confidence Interval for OR  
OR lower limit upper limit P
Clinical pregnancy 1.875 1.522 2.310 1.38E-10
Early miscarriage 0.889 0 .739 1.069 0.889
Ectopic pregnancy 1.019 0.802 1.295 0.876
Live birth 1.416 1.162 1.726 0.001
  1. Serum β-hCG was included as a categorical variable (categorized by 5–50, 51–100, 101–150, 151–200, 201–250, 251–299 mIU/ml)
  2. Adjusted for female age, days of embryo transfer and number of embryo transfer