Table 3.
Effect of VCI on delivery outcomes.
| Author | Year | Control No. |
Control Events |
VCI No. |
VCI Events |
Crude OR (95%CI) |
Adjusted OR (95%CI) |
|---|---|---|---|---|---|---|---|
| CD (all) | |||||||
| Yang M [29] | 2020 | 59,475 | 9456 | 501 | 116 | 1.59 (1.29–1.96) | -- |
| O’Quinn C [7] | 2020 | 30,953 | 8367 | 107 | 40 | 1.61 (1.09–2.39) | -- |
| Ebbing C [35] | 2013 | 613,978 | 82,949 | 9500 | 1946 | 1.65 (1.57–1.73) | 1.54 (1.47–1.62) |
| Räisänen S [36] | 2012 | 26,216 | 4064 | 633 | 140 | 1.55 (1.28–1.87) | -- |
| Elective CD | |||||||
| Yang M [29] | 2020 | 59,475 | 4163 | 501 | 35 | 1.00 (0.71–1.41) | -- |
| Ebbing C [35] | 2013 | 613,978 | 34,119 | 9500 | 600 | 1.15 (1.05–1.25) | 1.11 (1.02–1.22) |
| Räisänen S [36] | 2012 | 26,216 | 1783 | 633 | 43 | 1.00 (0.73–1.37) | -- |
| Emergent CD | |||||||
| Furuya S [25] | 2021 | 851 | 174 | 55 | 23 | 2.80 (1.60–4.90) | -- |
| Yang M [29] | 2020 | 59,475 | 5293 | 501 | 81 | 1.97 (1.55–2.51) | -- |
| Suzuki S [34] | 2015 | 16,797 | 1439 | 168 | 29 | 2.23 (1.49–3.33) | -- |
| Ebbing C [35] | 2013 | 613,978 | 48,830 | 9500 | 1346 | 1.91 (1.80–2.03) | 1.80 (1.69–1.91) |
| Räisänen S [36] | 2012 | 26,216 | 2281 | 633 | 97 | 1.90 (1.52–2.37) | -- |
| Instrumental delivery | |||||||
| Furuya S [25] | 2021 | 851 | 158 | 55 | 8 | 0.75 (0.35–1.61) | -- |
| O’Quinn C [7] | 2020 | 30,953 | 4871 | 107 | 16 | 0.94 (0.55–1.60) | -- |
| Ebbing C [35] | 2013 | 613,978 | 50,778 | 9500 | 783 | 1.00 (0.93–1.07) | 0.90 (0.83–0.97) |
| Räisänen S [36] | 2012 | 26,216 | 2124 | 633 | 56 | 1.10 (0.83–1.45) | -- |
ORs were calculated using RevMan version 5.4.1, and some values were inferred by the authors. Thus, certain values in the table were slightly different from the original values. Abbreviations: CD, cesarean delivery; Control No., number of women in the control group; Control events, number of events in the control group; VCI No., number of women with velamentous cord insertion; VCI events, number of events in the velamentous cord insertion group; Crude OR, crude odds ratio; Adjusted OR, adjusted odds ratio; CI, confidence interval; --, not applicable.