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. 2022 Feb 10;37(4):708–717. doi: 10.1093/humrep/deac020

Table III.

Efficacy variables for the full analysis set population.

Variable Time lapse group (n = 369) Control group (n = 376) P-value Difference between groups Mean (95% CI) Relative risk (95% CI)
Primary efficacy variable
No. of ongoing pregnancies (%) 175 (47.4%) 181 (48.1%) 0.90 −0.7 (−8.2, 6.7) 0.985 (0.848, 1.145)
(42.2–52.7%) (43.0–53.3%)
Secondary efficacy variables
No. of positive β-hCG pregnancies (%) 222 (60.2%) 222 (59.0%) 0.81 1.1 (−6.2, 8.4) 1.019 (0.905, 1.147)
(55.0–65.2%) (53.9–64.1%)
No. of early pregnancy losses (%) 47 (21.2%) 41 (18.5%) 0.55 2.7 (−5.2, 10.6) 1.146 (0.788, 1.668)
(16.0–27.1%) (13.6–24.2%)

For categorical variables, n (%) and exact 95% CI is presented. For comparison between groups, Fisher’s exact test (lowest one-sided P-value multiplied by 2) was used for dichotomous variables. The CI for dichotomous variables is the unconditional exact confidence limits. If no exact limits can be computed the asymptotic Wald confidence limits with continuity correction are calculated instead.