| NA | GA | |||
| N | % | N | % | |
| Total | 205,671 | 94.22 | 12,614 | 5.78 |
| Age | ||||
| Mean age (±SD) | 30.02 ± 5.95 | 29.26 ± 6.30 |
| |
| ≤18 years | 3319 | 1.61 | 366 | 2.90 |
| 19 - 34 years | 154,092 | 74.92 | 9502 | 75.33 |
| ≥35 years | 48,260 | 23.46 | 2746 | 21.77 |
| ASA PS class | ||||
| ASA I-II | 176,836 | 85.98 | 8983 | 71.21 |
| ASA III-V | 28,835 | 14.02 | 3631 | 28.79 |
| Time of day | ||||
| Day shift (7:00 AM - 5:00 PM) | 141,901 | 68.99 | 7177 | 56.90 |
| After hours (5:01 PM - 6:59 AM) | 63,770 | 31.01 | 5437 | 43.10 |
| Time of week | ||||
| Weekday | 176,812 | 85.97 | 10,230 | 81.10 |
| Weekend | 28,859 | 14.03 | 2384 | 18.90 |
| Urban versus rural | ||||
| Urban | 73,948 | 35.95 | 4229 | 33.53 |
| Rural | 114,278 | 55.56 | 7030 | 55.73 |
| Unknown | 17,445 | 8.48 | 1355 | 10.74 |
| Facility type | ||||
| University hospital | 18,088 | 8.79 | 1685 | 13.36 |
| Large community | 45,204 | 21.98 | 2196 | 17.41 |
| Medium-sized | ||||
| Community | 81,514 | 39.63 | 5543 | 43.94 |
| Other facility | 46,980 | 22.84 | 2690 | 21.33 |
| Unknown facility | 13,885 | 6.75 | 500 | 3.96 |
| United States region | ||||
| Northeast | 42,729 | 20.78 | 2515 | 19.94 |
| Midwest | 40,729 | 19.80 | 2628 | 20.83 |
| South | 81,869 | 39.81 | 5802 | 46.00 |
| West | 26,406 | 12.84 | 1169 | 9.27 |
| Unknown region | 13,938 | 6.78 | 500 | 3.96 |
| CD volume per year | ||||
| Volume ≤ 1000 | 149,312 | 72.60 | 9301 | 73.74 |
| Volume > 1000 | 56,359 | 27.40 | 3313 | 26.26 |
| Emergency status | ||||
| Not emergency | 192,625 | 93.66 | 10,378 | 82.27 |
| Emergency | 13,046 | 6.34 | 2236 | 17.73 |
| TOLAC | ||||
| Not TOLAC | 204,342 | 99.35 | 12,588 | 99.79 |
| TOLAC | 1329 | 0.65 | 26 | 0.21 |
| Year of CD | ||||
| 2010 | 26,397 | 12.83 | 1668 | 13.22 |
| 2011 | 32,728 | 15.91 | 1965 | 15.58 |
| 2012 | 44,516 | 21.64 | 2912 | 23.09 |
| 2013 | 40,028 | 19.46 | 2618 | 20.75 |
| 2014 | 55,162 | 26.82 | 3127 | 24.79 |
| 2015 | 6840 | 3.33 | 324 | 2.57 |