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Robson's 10-Group Classification of a selected group of Flemish women giving birth in 2008 and 2016: cesarean section per group (%).
| 2008 (%) | 2016 (%) | OR (95% CI) | |
|---|---|---|---|
| 1 | 11.6 | 8.4 | 1.425 (1.10-1.85) |
| 2a | 22.1 | 19.3 | 1.180 (0.87-1.60) |
| 2b | 100 | 100 | 0 |
| 3 | 2.5 | 1.3 | 1.943 (1.01-3.87) |
| 4a | 4.1 | 3.2 | 1.306 (0.65-2.68) |
| 4b | 100 | 100 | 0 |
| 5 | 69 | 64.2 | 1.242 (0.93-1.66) |
| 6 | 96.7 | 97.5 | 0.743 (0.11-3.91) |
| 7 | 91.6 | 94 | 0.697 (0.17-2.68) |
| 8 | 57.3 | 58.3 | 0.959 (0.46-1.99) |
| 9 | 90 | 90.9 | 0.905 (0.01-78.36) |
| 10 | 23.7 | 24.8 | 0.943 (0.60-1.47) |
