Table 4.
The contribution of each group of the Ten Group Classification to the overall rate of cesarean sections by race
| Robson group | White (n = 891,133) | Black (n = 217,196) | AIAN (n = 10,481) | Asian (n = 90,288) | NHOPI (n = 3368) | More than one (n = 28,694) |
|---|---|---|---|---|---|---|
| 1 | 6.0% (53457) | 5.4% (11709) | 4.9% (514) | 8.0% (7218) | 6.5% (220) | 7.0% (2002) |
| 2a | 6.5% (58344) | 5.6% (12174) | 6.2% (654) | 5.8% (5223) | 4.7% (157) | 7.2% (2071) |
| 2b | 8.1% (72310) | 7.6% (16558) | 4.2% (445) | 12.1% (10939) | 6.5% (220) | 8.2% (2354) |
| 3 | 3.3% (28995) | 4.5% (9755) | 3.8% (402) | 3.4% (3048) | 4.0% (136) | 4.2%(1216) |
| 4a | 3.3% (29142) | 4.0% (8744) | 3.6% (374) | 2.5% (2228) | 2.8% (94) | 3.8% (1085) |
| 4b | 10.0% (88888) | 10.7% (23179) | 8.5% (886) | 8.8% (7907) | 8.3% (281) | 9.1% (2624) |
| 5 | 34.3% (305424) | 31.9% (69367) | 36.1% (3779) | 33.6% (30296) | 34.4% (1158) | 32.4% (9309) |
| 6 | 3.7% (33408) | 1.7% (3759) | 2.5% (266) | 4.2% (3778) | 2.3% (79) | 3.1% (901) |
| 7 | 5.6% (50212) | 4.4% (9548) | 7.1% (748) | 4.9% (4441) | 8.0% (271) | 5.1% (1468) |
| 8 | 8.1% (72089) | 8.4% (18299) | 6.4% (672) | 7.7% (6962) | 5.8% (197) | 8.2% (2343) |
| 9 | 2.3% (20432) | 1.9% (4107) | 4.2% (435) | 1.6% (1421) | 3.4% (114) | 2.0% (570) |
| 10 | 8.8% (78432) | 13.8% (29997) | 12.5% (1306) | 7.6% (6827) | 13.1% (441) | 9.6% (2751) |
AIAN American Indian or Alaskan Native, NHOPI Native Hawaiian or Other Pacific Islander