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ROC curves for size of ectopic mass and β-hCG level as discriminators between surgery and DD-MTX. Size of ectopic mass AUC: 0.65 (95% CI: 0.57-0.73), P-value 0.01, β-hCG level AUC: 0.64 (95% CI: 0.55-0.72), P-value 0.01. AUC: Area under curve, CI: Confidence interval, ROC: Receiver operating characteristics, β-hCG: Beta-human chorionic gonadotropin.
