Table 2.
Cesarean section rates by race across Robson groups
| Robson group | White (A) | Black (B) | AIAN (C) | Asian (D) | NHOPI (E) | More than one (F) |
|---|---|---|---|---|---|---|
| Overall | 31.0%C,F (891,133/2874450) | 35.4%A,C,D,E,F (217,196/614305) | 28.1% (10,481/37358) | 33.1%A,C,E,F (90,288/272990) | 29.9%C (3368/11263) | 30.0%C (28,694/95722) |
| 1 - Nulliparous, singleton, cephalic, ≥ 37 weeks, in spontaneous labor | 11.6% (53,457/460331) | 14.0%A,C,D,F (11,709/83803) | 10.4% (514/4921) | 12.6%A,C,F (7218/57324) | 13.6%C (220/1613) | 11.7% (2002/17146) |
| 2a - Nulliparous, singleton, cephalic, ≥ 37 weeks, induced labor | 24.6% (58,344/237497) | 30.2% A,C,D,F (12,174/40330) | 26.1% (654/2508) | 26.2%A (5223/19965) | 28.6% (157/549) | 25.8% (2071/8025) |
| 2b - Nulliparous, singleton, cephalic, ≥ 37 weeks, pre-labor cesarean delivery | 100.0% (72,310/72310) | 100.0% (16,558/16558) | 100.0% (445/445) | 100.0% (10,939/10939) | 100.0% (220/220) | 100.0% (2354/2354) |
| 3 - Multiparous (excluding previous cesareans), single, cephalic, ≥ 37 weeks, in spontaneous labor | 3.5% (28,995/828874) | 5.6% A,C,D,E,F (9755/173022) | 3.4% (402/11936) | 3.9%A (3048/79058) | 3.6% (136/3758) | 4.4%A,C,D (1216/27696) |
| 4a - Multiparous (excluding previous cesareans), single, cephalic, ≥ 37 weeks, induced labor | 7.4% (29,142/391576) | 12.2%A,C,D,E,F (8744/71433) | 7.1% (374/5297) | 9.7%A,C (2228/22944) | 8.7% (94/1078) | 9.3%A,C (1085/11725) |
| 4b - Multiparous (excluding previous cesareans), single, cephalic, ≥ 37 weeks, pre-labor cesarean delivery | 100.0% (88,888/88888) | 100.0% (23,179/23179) | 100.0% (886/886) | 100.0% (7907/7907) | 100.0% (281/281) | 100.0% (2624/2624) |
| 5 - Previous cesarean delivery, single, cephalic, ≥ 37 weeks | 86.6%E (305,424/352499) | 86.6%E (69,367/80138) | 85.4%E (3779/4426) | 86.6%E (30,296/34996) | 77.6% (1158/1492) | 86.1%E (9309/10810) |
| 6 - All nulliparous breeches | 95.7%B (33,408/34902) | 89.6% (3759/4196) | 94.3% (266/282) | 96.4%B (3778/3918) | 91.9% (79/86) | 94.7%B (901/951) |
| 7 - All multiparous breeches (including previous cesareans) | 93.3%B (50,212/53796) | 90.2% (9548/10585) | 92.1% (748/812) | 93.9%B (4441/4731) | 92.5% (271/293) | 92.6%B (1468/1585) |
| 8 - All multiple deliveries (including previous cesareans) | 73.6%C (72,089/97993) | 73.7%C (18,299/24824) | 65.0% (672/1034) | 80.3%A,B,C,E,F (6962/8668) | 66.6% (197/296) | 71.8%C (2343/3261) |
| 9 - All transverse and oblique lies (including previous cesareans) | 59.3%B,D,F (20,432/34470) | 52.3% (4107/7852) | 75.7%A,B,D,E,F (435/575) | 50.7% (1421/2805) | 57.0% (114/200) | 51.4% (570/1109) |
| 10 - All pre-term, single, cephalic, ≤ 36 weeks (including previous cesareans) | 35.4%C,E,F (78,432/221314) | 38.3%A,C,D,E,F (29,997/78385) | 30.8% (1306/4236) | 34.6% (6827/19735) | 31.6%C,F (441/1397) | 32.6% (2751/8436) |
For each statistically significant pair (Bonferroni adjusted, p < .05), the key of the racial group(s) with a significantly lower CS rate appears in superscript
AIAN American Indian or Alaskan Native, NHOPI Native Hawaiian or Other Pacific Islander