Table 2. Baseline characteristics for the entire study cohort and stratified by induction therapy status.
| Baseline characteristics | Total (n=1,849) | No induction therapy (n=1,683) | Induction therapy (n=166) | P |
|---|---|---|---|---|
| Age (years), median [IQR] | 59 [49, 68] | 59 [50, 68] | 57.5 [42, 65] | <0.001 |
| Female, n (%) | 983 (53.2) | 907 (53.9) | 76 (45.8) | 0.055 |
| Race, n (%) | 0.286 | |||
| White | 1,328 (71.8) | 1,217 (72.3) | 111 (66.9) | |
| Black | 303 (16.4) | 269 (16.0) | 34 (20.5) | |
| Other | 196 (10.6) | 178 (10.6) | 18 (10.8) | |
| Unknown | 22 (1.2) | 19 (1.1) | 3 (1.8) | |
| Insurance status, n (%) | 0.323 | |||
| Private | 1,013 (54.8) | 914 (54.3) | 99 (59.6) | |
| Medicare | 602 (32.6) | 559 (33.2) | 43 (25.9) | |
| Medicaid | 125 (6.8) | 113 (6.7) | 12 (7.2) | |
| Government | 19 (1.0) | 17 (1.0) | 2 (1.2) | |
| Uninsured | 65 (3.5) | 59 (3.5) | 6 (3.6) | |
| Unknown | 25 (1.4) | 21 (1.2) | 4 (2.4) | |
| Charlson comorbidity index, n (%) | 0.006 | |||
| 0 | 1,410 (76.3) | 1,267 (75.3) | 143 (86.1) | |
| 1 | 354 (19.1) | 336 (20.0) | 18 (10.8) | |
| ≥2 | 85 (4.6) | 80 (4.8) | 5 (3.0) | |
| Education level, n (%) | 0.026 | |||
| Above median | 1,100 (59.5) | 989 (58.8) | 111 (66.9) | |
| Below median | 732 (39.6) | 681 (40.5) | 51 (30.7) | |
| Unknown | 17 (0.9) | 13 (0.8) | 4 (2.4) | |
| Income level, n (%) | 0.717 | |||
| Above median | 1,183 (64.0) | 1,081 (64.2) | 102 (61.4) | |
| Below median | 649 (35.1) | 589 (35.0) | 60 (36.1) | |
| Unknown | 17 (0.9) | 13 (0.8) | 4 (2.4) | |
| Distance to facility (miles), median [IQR] | 10.2 [4.9, 26.2] | 10.0 [4.7, 25.3] | 16.5 [6.2, 40.1] | 0.075 |
| Year of diagnosis, n (%) | 0.355 | |||
| 2006 | 201 (10.9) | 184 (10.9) | 17 (10.2) | |
| 2007 | 221 (12.0) | 197 (11.7) | 24 (14.5) | |
| 2008 | 208 (11.2) | 191 (11.3) | 17 (10.2) | |
| 2009 | 215 (11.6) | 201 (11.9) | 14 (8.4) | |
| 2010 | 234 (12.7) | 212 (12.6) | 22 (13.3) | |
| 2011 | 226 (12.2) | 197 (11.7) | 29 (17.5) | |
| 2012 | 274 (14.8) | 253 (15.0) | 21 (12.7) | |
| 2013 | 270 (14.6) | 248 (14.7) | 22 (13.3) | |
| Histology, n (%) | 0.076 | |||
| Type A | 178 (9.6) | 168 (10.0) | 10 (6.0) | |
| Type AB | 422 (22.8) | 390 (23.2) | 32 (19.3) | |
| Type B1 | 271 (14.7) | 242 (14.4) | 29 (17.5) | |
| Type B2 | 318 (17.2) | 296 (17.6) | 22 (13.3) | |
| Type B3 | 287 (15.5) | 253 (15.0) | 34 (20.5) | |
| Not specified | 373 (20.2) | 334 (19.8) | 39 (23.5) | |
| Facility type, n (%) | 0.002 | |||
| Research/academic | 792 (42.8) | 710 (42.2) | 82 (49.4) | |
| Comprehensive community | 634 (34.3) | 599 (35.6) | 35 (21.1) | |
| Community | 85 (4.6) | 81 (4.8) | 4 (2.4) | |
| Unknown | 338 (18.3) | 293 (17.4) | 45 (27.1) |