Table 2. Summary of the accuracy results of all indicators for the prediction of IOL.
| Indicator | Pooled studies (N) | Patients (N) | Pooled SN (95% CI) |
Pooled SP (95% CI) |
Pooled PLR (95% CI) |
Pooled NLR (95% CI) |
Pooled DOR (95% CI) |
AUC (SE) |
|---|---|---|---|---|---|---|---|---|
| CL for successful IOL | 36 | 5,506 | 0.67 (0.66–0.69) |
0.70 (0.68–0.72) |
2.31 (1.87–2.86) |
0.40 (0.33–0.49) |
6.54 (4.47–9.50) |
0.78 (0.0250) |
| CL for failed IOL | 19 | 3,560 | 0.70 (0.67–0.73) |
0.61 (0.59–0.62) |
1.82 (1.61–2.06) |
0.49 (0.39–0.61) |
4.01 (2.89–5.54) |
0.6861 (0.0261) |
| CW for failed IOL | 8 | 2,851 | 0.35 (0.31–0.38) |
0.8 (0.74–0.85) |
1.71 (1.22–2.40) |
0.78 (0.67–0.91) |
2.29 (1.43–3.68) |
0.6555 (0.0742) |
| CLS for successful IOL | 2 | 257 | 0.77 (0.70–0.83) |
0.61 (0.50–0.72) |
2.01 (1.48–2.74) |
0.36 (0.25–0.52) |
5.72 (2.84–11.52) |
0.5 (0.0) |
| PCA for successful IOL | 7 | 1,345 | 0.79 (0.76–0.82) |
0.73 (0.67–0.77) |
2.48 (1.89–3.25) |
0.30 (0.21–0.43) |
9.77 (5.15–18.54) |
0.8484 (0.0425) |
| PCA for failed IOL | 3 | 550 | 0.67 (0.59–0.74) |
0.61 (0.56–0.66) |
2.36 (0.70–7.97) |
0.45 (0.10–1.97) |
5.37 (0.40–72.47) |
0.8564 (0.0265) |
| FHPD for successful IOL | 3 | 594 | 0.58 (0.53–0.63) |
0.66 (0.58–0.73) |
1.95 (0.12–31.66) |
0.36 (0.02–6.70) |
5.33 (0.04–763.32) |
0.9992 (0.0094) |
IOL, induction of labor; SN, sensitivity; CI, confidence interval; SP, specificity; PLR, positive likelihood ratio; NLR, negative likelihood ratio; DOR, diagnostic odds ratio; AUC, area under the curve; SE, standard error; CL, cervical length; CW, cervical wedging; CLS, cervical length shortening; PCA, posterior cervical angle; FHPD, fetal head-perineal distance.