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| Total (%) | Male | Female | p value | |
|---|---|---|---|---|
| Normal | 1616 (97.7) | 569 (97.8) | 1047 (97.7) | 0.96 |
| Anterior one third hypoplastic | 6 (0.4) | 3 (0.5) | 3 (0.3) | 0.74 |
| Atractic anterior one third | 15 (0.9) | 6 (1.0) | 9 (0.8) | 0.90 |
| Hypoplastic Anterior Half of SSS | 1 (0.1) | 0 (0) | 1 (0.1) | 1.00 |
| Hypoplastic anterior 2/3rd of SSS | 3 (0.2) | 1 (0.2) | 2 (0.2) | 0.59 |
| Hypoplastic middle part of SSS | 13 (0.7) | 3 (0.5) | 10 (0.9) | 0.53 |
