Table 1.
Patient demographics before propensity score matching (endometrial cancer cohort).
| Characteristics | Oophorectomy | Ovarian conservation | P-value |
|---|---|---|---|
| Number | n = 8191 | n = 2314 | |
| Age (years) | 43.2 (±5.3) | 40.2 (±6.2) | <0.001 |
| <40 | 1816 (22.2%) | 935 (40.4%) | |
| ≥40 | 6375 (77.8%) | 1379 (59.6%) | |
| Year | 0.34a | ||
| 2007 | 1207 (14.7%) | 400 (17.3%) | |
| 2008 | 1079 (13.2%) | 324 (14.0%) | |
| 2009 | 1128 (13.8%) | 285 (12.3%) | |
| 2010 | 979 (12.0%) | 317 (13.7%) | |
| 2011 | 918 (11.2%) | 297 (12.8%) | |
| 2012 | 1005 (12.3%) | 195 (8.4%) | |
| 2013 | 755 (9.2%) | 240 (10.4%) | |
| 2014 | 690 (8.4%) | 170 (7.3%) | |
| 2015 | 430 (5.2%) | 85 (3.7%) | |
| Race/ethnicity | 0.001 | ||
| White | 4347 (53.1%) | 1199 (51.8%) | |
| Black | 657 (8.0%) | 165 (7.1%) | |
| Hispanic | 1323 (16.2%) | 432 (18.7%) | |
| Asian or Pacific Islander | 399 (4.9%) | 94 (4.1%) | |
| Native American | 96 (1.2%) | 43 (1.9%) | |
| Other | 221 (2.7%) | 44 (1.9%) | |
| Missing | 1147 (14.0%) | 336 (14.5%) | |
| Obesity | <0.001 | ||
| No | 4550 (55.5%) | 1571 (67.9%) | |
| Yes | 3641 (44.5%) | 743 (32.1%) | |
| Charlson Index | <0.001 | ||
| 0 | 5171 (63.1%) | 1611 (69.6%) | |
| 1 | 2197 (26.8%) | 585 (25.3%) | |
| 2 | 517 (6.3%) | 77 (3.3%) | |
| 3 | 203 (2.5%) | 35 (1.5%) | |
| ≥4 | 103 (1.3%) | b | |
| Median household income | <0.001 | ||
| $1–$38,999 | 1018 (12.4%) | 320 (13.8%) | |
| $39,000–$47,999 | 929 (11.3%) | 205 (8.9%) | |
| $48,000–$62,999 | 959 (11.7%) | 191 (8.3%) | |
| ≥$63,000 | 777 (9.5%) | 236 (10.2%) | |
| Missing | 4508 (55.0%) | 1361 (58.8%) | |
| Primary expected payer | <0.001 | ||
| Medicare | 615 (7.5%) | 113 (4.9%) | |
| Medicaid | 1188 (14.5%) | 333 (14.4%) | |
| Private including HMO | 5367 (65.5%) | 1579 (68.3%) | |
| Self-pay | 554 (6.8%) | 150 (6.5%) | |
| No charge | 82 (1.0%) | 57 (2.5%) | |
| Other | 346 (4.2%) | 81 (3.5%) | |
| Missing | 39 (0.5%) | b | |
| Hospital bed size | <0.001 | ||
| Small | 722 (8.8%) | 168 (7.3%) | |
| Medium | 1735 (21.2%) | 580 (25.1%) | |
| Large | 5632 (68.8%) | 1554 (67.2%) | |
| Missing | 102 (1.2%) | 11 (0.5%) | |
| Hospital teaching status | <0.001 | ||
| Rural | 466 (5.7%) | 193 (8.3%) | |
| Urban non-teaching | 1935 (23.6%) | 709 (30.6%) | |
| Urban teaching | 5689 (69.4) | 1402 (60.6%) | |
| Missing | 102 (1.2%) | 11 (0.5%) | |
| Hospital region | <0.001 | ||
| Northeast | 1661 (20.3%) | 532 (23.0%) | |
| Midwest | 1816 (22.2%) | 413 (17.8%) | |
| South | 2644 (32.3%) | 736 (31.8%) | |
| West | 2070 (25.3%) | 634 (27.4%) | |
| Hysterectomy approach | <0.001 | ||
| Abdominal | 5331 (65.1%) | 1258 (54.4%) | |
| Minimally invasive | 2827 (34.5%) | 1056 (45.6%) | |
| Missing | 34 (0.4%) | b |
Chi-square test or Student t-test for P-values. Significant P-values are emboldened.
a
Joinpoint regression model for temporal trend analysis (examined every six month time period).
b
Indicated number of ≤10, required to suppress per the Healthcare Cost and Utilization Project.