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. 2020 Nov 12;13:132. doi: 10.1186/s13048-020-00732-6

Table 4.

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

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

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)

Adjusted for female age, days of embryo transfer and number of embryo transfer