Table 2.
Patient demographics per hospital surgical volume (whole cohort, N = 815).
| Characteristic | Non-top decile | Top decile | P-value |
|---|---|---|---|
| Number | n = 568 | n = 247 | |
| Age (years) | 32.1 (±5.9) | 31.2 (±4.9) | 0.032 |
| <30 | 207 (36.4%) | 90 (36.6%) | |
| 30–39 | 295 (51.9%) | 141 (57.3%) | |
| 40–45 | 66 (11.6%) | 15 (6.1%) | |
| Year | <0.001 | ||
| 2001–2004 | 107 (18.9%) | 41 (16.6%) | |
| 2005–2008 | 220 (38.8%) | 144 (58.3%) | |
| 2009–2011 | 240 (42.3%) | 62 (25.1%) | |
| Race/ethnicity | <0.001 | ||
| White | 302 (53.2%) | 174 (70.4%) | |
| Black | 31 (5.5%) | 14 (5.7%) | |
| Hispanic | 84 (14.8%) | 25 (10.1%) | |
| Othera | 151 (26.6%) | 34 (13.8%) | |
| Obesity | 0.008 | ||
| No | 553 (97.4%) | 247 (100%) | |
| Yes | 15 (2.6%) | 0 | |
| Charlson Index | 0.025 | ||
| 0 | 505 (88.9%) | 208 (84.2%) | |
| 1 | 47 (8.3%) | 35 (14.2%) | |
| 2 | 16 (2.8%) | b | |
| Median household income | 0.155 | ||
| <$39,000 | 92 (18.3%) | 42 (20.9%) | |
| $39,000–$47,999 | 107 (21.2%) | 28 (13.9%) | |
| $48,000–$62,999 | 154 (30.6%) | 63 (31.3%) | |
| ≥$63,000 | 151 (30.0%) | 68 (33.8%) | |
| Primary expected payer | <0.001 | ||
| Medicare | 27 (4.8%) | 0 | |
| Medicaid | 106 (18.7%) | 28 (11.4%) | |
| Private including HMO | 373 (65.8%) | 200 (81.3%) | |
| Self-pay | 24 (4.2%) | 18 (7.3%) | |
| Other | 37 (6.5%) | 0 | |
| Hospital bed sizec | <0.001 | ||
| Small | 38 (6.7%) | 59 (23.9%) | |
| Medium | 83 (14.6%) | 65 (26.3%) | |
| Large | 446 (78.7%) | 123 (49.8%) | |
| Hospital teaching status | <0.001 | ||
| Rural | b | 0 | |
| Urban Non-teaching | 84 (14.8%) | 0 | |
| Urban teaching | 475 (83.6%) | 247 (100%) | |
| Hospital region | <0.001 | ||
| Northeast | 128 (22.5%) | 58 (23.5%) | |
| Midwest | 102 (18.0%) | 37 (15.0%) | |
| South | 174 (30.6%) | 117 (47.4%) | |
| West | 164 (28.9%) | 35 (14.2%) | |
| Lymphadenectomy | <0.001 | ||
| No | 100 (17.6%) | b | |
| Yes | 468 (82.4%) | 238 (96.4%) | |
| Robotic assisted | 0.342 | ||
| No | 506 (89.1%) | 214 (86.6%) | |
| Yes | 62 (10.9%) | 33 (13.4%) | |
| Length of stay (days) | 3 (IQR 2–4) | 3 (IQR 2–4) | 0.001 |
| Corrected total charge ($) | 42,186 (IQR 26.739–64,176) | 40,431 (IQR 31,913-58,003) | 0.960 |
Mean (±SD), median (IQR), or number (percentage per column) is shown. Total number may not be 815 due to weighted value. Chi-square test, Fisher exact test, Student t-test, or Mann-Whitney U test for P-value.
a
Including unknown.
b
Number suppressed due to the HCUP requirement (1–10).
c
Based upon hospital region, urban-rural designation, and teaching status that was determined per the HCUP.