Table 2.
Subgroup analyses on clinical pregnancy rate (random-effects model, n = 14).
| Subgroups | Risk ratio [95% CI] | Coefficient | Heterogeneity | |
|---|---|---|---|---|
| P-value | I2 (%) | P-value | ||
| (1) Type of control | ||||
| Sham acupuncture (n = 2) | 1.24 [0.49, 3.18] | 0.65 | 81 | 0.02 |
| No adjuvant treatment (n = 12) | 1.67 [1.41, 1.97] | <0.00001 | 0 | 0.97 |
| (2) Acupuncture sessions | ||||
| Before FFT (n = 6) | 1.75 [1.37, 2.23] | <0.00001 | 0 | 0.78 |
| Around FET (n = 7) | 1.64 [1.32, 2.05] | <0.0001 | 0 | 0.94 |
| After FET (n = 1) | 0.82 [0.60, 1.13] | 0.22 | ||
| (3) Total times of acupuncture | ||||
| Less than 5 times (n = 3) | 1.15 [0.70, 1.90] | 0.57 | 66 | 0.05 |
| 5-15 times (n = 5) | 1.59 [1.24, 2.04] | 0.0003 | 0 | 0.81 |
| More than 15 times (n = 6) | 1.86 [1.44, 2.40] | <0.00001 | 0 | 0.96 |
| (4) Populations | ||||
| Recurrent implantation failure (n = 6) | 1.57 [1.57, 1.21] | 0.0006 | 0 | 0.8 |
| Anovulation (n = 1) | 1.67 [1.00, 2.76] | 0.05 | ||
| Polycystic ovary syndrome (n = 1) | 1.77 [1.09, 2.88] | 0.02 | ||
| Elderly women (> 35 years old) (n = 1) | 2.19 [1.11, 4.33] | 0.02 | ||
| Unclear (n = 5) | 1.46 [0.96, 2.22] | 0.08 | 68 | 0.1 |