Potential risk factor variables | Adjusted OR* (95% CI) | P-value |
---|---|---|
Clinical pregnancy | ||
 FET timing (Immediate FETa versus delayed FETb) | 0.939 (0.781–1.129) | NS |
 Age (35–37 versus ≤34) | 0.929 (0.690–1.251) | NS |
 Age (≥38 versus ≤34) | 0.422 (0.268–0.663) | P < 0.001 |
 BMI (< 18.5 versus 18.5–24.9) | 1.073 (0.729–1.577) | NS |
 BMI (≥25 versus 18.5–24.9) | 1.120 (0.910–1.378) | NS |
 COH protocol (short-acting GnRH-a versus GnRH-ant) | 1.256 (1.010–1.562) | P < 0.05 |
 COH protocol (long-acting GnRH-a versus GnRH-ant) | 1.363 (0.973–1.909) | NS |
 Trigger type (GnRH-a trigger versus HCG trigger) | 1.267 (0.924–1.738) | NS |
 Trigger type (Double trigger versus HCG trigger) | 2.737 (1.227–6.106) | P < 0.05 |
 Insemination method (ICSI versus IVF) | 0.875 (0.687–1.115) | NS |
 Number of embryo transferred (2 versus 1) | 1.573 (1.147–2.156) | P < 0.01 |
 Embryo stage (blastocyst versus cleavage) | 2.682 (1.999–3.599) | P < 0.001 |
 Top or good quality embryo transfer (yes versus no) | 1.203 (0.940–1.539) | NS |
 Tubal factor (yes versus no) | 1.110 (0.877–1.407) | NS |
 Ovulatory disorder (yes versus no) | 1.111 (0.877–1.407) | NS |
 Male factor (yes versus no) | 1.172 (0.925–1.486) | NS |
 Unexplained factor (yes versus no) | 1.452 (0.870–2.423) | NS |
Spontaneous abortion | ||
 FET timing (Immediate FETa versus delayed FETb) | 0.831 (0.628–1.098) | NS |
 Age (35–37 versus ≤34) | 1.088 (0.693–1.707) | NS |
 Age (≥38 versus ≤34) | 1.214 (0.638–2.310) | NS |
 BMI (< 18.5 versus 18.5–24.9) | 0.967 (0.505–1.852) | NS |
 BMI (≥25 versus 18.5–24.9) | 1.787 (1.336–2.391) | P < 0.001 |
 COH protocol (short-acting GnRH-a versus GnRH-ant) | 0.833 (0.594–1.167) | NS |
 COH protocol (long-acting GnRH-a versus GnRH-ant) | 1.236 (0.758–2.014) | NS |
 Trigger type (GnRH-a trigger versus HCG trigger) | 0.871 (0.550–1.379) | NS |
 Trigger type (Double trigger versus HCG trigger) | 1.465 (0.642–3.343) | NS |
 Insemination method (ICSI versus IVF) | 1.114 (0.768–1.617) | NS |
 Number of embryo transferred (2 versus 1) | 0.965 (0.624–1.490) | NS |
 Embryo stage (blastocyst versus cleavage) | 1.200 (0.769–1.810) | NS |
 Top or good quality embryo transfer (yes versus no) | 1.114 (0.754–1.647) | NS |
 Tubal factor (yes versus no) | 0.729 (0.514–1.033) | NS |
 Ovulatory disorder (yes versus no) | 1.335 (0.949–1.878) | NS |
 Male factor (yes versus no) | 0.709 (0.491–1.022) | NS |
 Unexplained factor (yes versus no) | 0.744 (0.347–1.596) | NS |
Live birth | ||
 FET timing (Immediate FETa versus delayed FETb) | 1.056 (0.883–1.263) | NS |
 Age (35–37 versus ≤34) | 0.936 (0.701–1.251) | NS |
 Age (≥38 versus ≤34) | 0.365 (0.222–0.599) | P < 0.001 |
 BMI (< 18.5 versus 18.5–24.9) | 1.085 (0.748–1.574) | NS |
 BMI (≥25 versus 18.5–24.9) | 0.841 (0.688–1.028) | NS |
 COH protocol (short-acting GnRH-a versus GnRH-ant) | 1.267 (1.023–1.569) | P < 0.05 |
 COH protocol (long-acting GnRH-a versus GnRH-ant) | 1.241 (0.895–1.720) | NS |
 Trigger type (GnRH-a trigger versus HCG trigger) | 1.316 (0.968–1.789) | NS |
 Trigger type (Double trigger versus HCG trigger) | 1.956 (1.002–3.821) | NS |
 Insemination method (ICSI versus IVF) | 0.892 (0.704–1.129) | NS |
 Number of embryo transferred (2 versus 1) | 1.460 (1.092–1.953) | P < 0.05 |
 Embryo stage (blastocyst versus cleavage) | 2.289 (1.748–2.998) | P < 0.001 |
 Top or good-quality embryo transfer (yes versus no) | 1.224 (0.961–1.559) | NS |
 Tubal factor (yes versus no) | 1.229 (1.032–1.635) | P < 0.05 |
 Ovulatory disorder (yes versus no) | 0.951 (0.757–1.195) | NS |
 Male factor (yes versus no) | 1.326 (1.054–1.668) | P < 0.05 |
 Unexplained factor (yes versus no) | 1.549 (0.935–2.518) | NS |