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Table 1 Patient and medical center characteristics in all veterans and by treatment group

From: Chemoradiation treatment patterns among United States Veteran Health Administration patients with unresectable stage III non-small cell lung cancer

Characteristics All patients (N = 4054) CCRT (N = 1893) SCRT (N = 514) RT only (N = 466) CT only (N = 541) Neither (N = 640) P-value a
Patient-related
Age
  Mean (SD) 68.7 (8.2) 67.3 (7.4) 67.4 (7.3) 72.3 (8.9) 69.0 (8.4) 71.4 (8.9)  
  Median (Q1-Q3) 68.0 (63.0–74.0) 67.0 (63.0–71.0) 67.0 (63.0–71.0) 71.0 (66.0–80.0) 67.0 (63.0–75.0) 70.0 (65.0–78.0) <.0001
Gender
  Male 3954 (97.5%) 1847 (97.6%) 496 (96.5%) 457 (98.1%) 530 (98.0%) 624 (97.5%) 0.5120
Race
  White 3164 (78.0%) 1499 (79.2%) 392 (76.3%) 343 (73.6%) 443 (81.9%) 487 (76.1%) 0.0053
  Black or African American 669 (16.5%) 304 (16.1%) 90 (17.5%) 88 (18.9%) 68 (12.6%) 119 (18.6%)  
  Other 67 (1.7%) 21 (1.1%) 15 (2.9%) + 13 (2.4%) +  
  Unknown 154 (3.8%) 69 (3.6%) 17 (3.3%) ++ 17 (3.1%) ++  
Ethnicity
  Hispanic or Latino 97 (2.4%) 36 (1.9%) 13 (2.5%) 11 (2.4%) 22 (4.1%) 15 (2.3%) 0.0310
  Not Hispanic or Latino 3826 (94.4%) 1803 (95.2%) 490 (95.3%) 440 (94.4%) 493 (91.1%) 600 (93.8%)  
  Unknown 131 (3.2%) 54 (2.9%) 11 (2.1%) 15 (3.2%) 26 (4.8%) 25 (3.9%)  
Marital Status b
  Married 1810 (44.6%) ++ ++ ++ ++ ++ 0.2897
  Not Married 2228 (55.0%) 1014 (53.6%) 281 (54.7%) 259 (55.6%) 290 (53.6%) 384 (60.0%)  
  Unknown 16 (0.4%) + + + + +  
Medicare enrollment any time between 2013 and 2017
  Yes 3361 (82.9%) 1522 (80.4%) 426 (82.9%) 414 (88.8%) 441 (81.5%) 558 (87.2%) <.0001
Medicaid-eligible
  Yes 68 (1.7%) 27 (1.4%) + + ++ + 0.4563
  No 3910 (96.4%) 1835 (96.9%) 491 (95.5%) 448 (96.1%) 517 (95.6%) 619 (96.7%)  
 Unknown 76 (1.9%) 31 (1.6%) ++ ++ + ++  
Priority status
  Non-service connected 2021 (49.9%) 917 (48.4%) 251 (48.8%) 262 (56.29%) 258 (47.7%) 333 (52.0%) 0.0553
  Service connected < 50% 596 (14.7%) 269 (14.2%) 77 (15.0%) 68 (14.6%) 85 (15.7%) 97 (15.2%)  
  Service connected 50 to 100% 1437 (35.4%) 707 (37.3%) 186 (36.2%) 136 (29.2%) 198 (36.6%) 210 (32.8%)  
Rurality of patient residence
  Urban 2531 (62.4%) 1178 (62.2%) 319 (62.1%) 310 (66.5%) 318 (58.8%) 406 (63.4%) 0.3908
Distance between patient residence and medical center
  Mean (SD) 93.2 (122.4) 85.9 (85.9) 88.6 (143.3) 83.9 (76.1) 114.5 (185.2) 107.2 (150.5)  
  Median (Q1-Q3) 66.3 (20.6–127.5) 64.4 (20.5–122.1) 56.9 (18.6–113.6) 66.1 (18.2–130.0) 71.7 (27.0–131.4) 74.4 (21.2–145.4) 0.0061
  Unknown + + + + + +  
Histology
  Squamous 2102 (51.9%) 1027 (54.3%) 291 (56.6%) 260 (55.8%) 229 (42.3%) 295 (46.1%) <.0001
  Adenocarcinoma 1447 (35.7%) 656 (34.7%) 171 (33.3%) 141 (30.3%) 236 (43.6%) 243 (38.0%)  
  Other 505 (12.5%) 210 (11.1%) 52 (10.1%) 65 (13.9%) 76 (14.0%) 102 (15.9%)  
Smoking status
  Current smoker 2272 (56.0%) 1127 (59.5%) 299 (58.2%) 243 (52.2%) 266 (49.2%) 337 (52.7%) 0.0003
  Former smoker 1400 (34.5%) 619 (32.7%) 165 (32.1%) 176 (37.8%) 202 (37.3%) 238 (37.2%)  
  Never smoker 133 (3.3%) 47 (2.5%) 15 (2.9%) 17 (3.7%) 29 (5.4%) 25 (3.9%)  
  Unknown 249 (6.1%) 100 (5.3%) 35 (6.8%) 30 (6.4%) 44 (8.1%) 40 (6.3%)  
Charlson-Deyo comorbidity score
  Mean (SD) 3.4 (2.6) 3.2 (2.4) 3.3 (2.6) 4.0 (2.9) 3.3 (2.6) 3.6 (2.6)  
  Median (Q1-Q3) 3.0 (1.0–5.0) 3.0 (1.0–4.0) 3.0 (2.0–4.0) 3.0 (2.0–6.0) 3.0 (1.0–4.0) 3.0 (2.0–5.0) <.0001
  0 333 (8.2%) 167 (8.8%) ++ ++ ++ ++ <.0001
  1 684 (16.9%) 352 (18.6%) 76 (14.8%) 61 (13.1%) 83 (15.3%) 112 (17.5%)  
  2 676 (16.7%) 315 (16.6%) 94 (18.3%) 67 (14.4%) 106 (19.6%) 94 (14.7%)  
  3 760 (18.7%) 366 (19.3%) 109 (21.2%) 80 (17.2%) 96 (17.7%) 109 (17.0%)  
  4+ 1565 (38.6%) 675 (35.7%) 185 (36.0%) 225 (48.3%) 197 (36.4%) 283 (44.2%)  
  Unknown 36 (0.9%) 18 (1.0%) + + + +  
Medical Center-related
Certified by Commission on Cancer
  Yes 2928 (72.2%) 1379 (72.8%) 387 (75.3%) 354 (76.0%) 376 (69.5%) 432 (67.5%) 0.0162
  No 1107 (27.3%) 503 (26.6%) ++ ++ ++ ++  
  Unknown 19 (0.5%) 11 (0.6%) + + + +  
Geographic (Census) region
  Northeast 530 (13.1%) ++ ++ ++ ++ ++ <.0001
  Midwest 1068 (26.3%) 542 (28.6%) 128 (24.9%) 110 (23.6%) 130 (24.0%) 158 (24.7%)  
  South 1806 (44.5%) 829 (43.8%) 245 (47.7%) 225 (48.3%) 221 (40.9%) 286 (44.7%)  
  West 622 (15.3%) 261 (13.8%) 69 (13.4%) 70 (15.0%) 110 (20.3%) 112 (17.5%)  
  Puerto Rico 28 (0.7%) + + + + +  
Total number of unique patients seen at oncology clinics at medical center
  Mean (SD) 217.7 (157.2) 226.0 (159.5) 218.2 (157.5) 204.1 (149.9) 196.5 (150.4) 220.3 (158.9)  
  Median (Q1-Q3) 196.0 (95.0–302.0) 208.0 (99.0–328.0) 191.0 (93.0–301.0) 185.5 (90.0–290.0) 170.0 (85.0–275.0) 204.0 (93.5–318.5) 0.0009
Total number of oncologists at medical center
  Mean (SD) 12.8 (7.7) 10.6 (5.9) 10.8 (5.2) 10.9 (5.5) 9.6 (5.8) 9.7 (5.7)  
  Median (Q1-Q3) 12.0 (7.0–17.0) 11.0 (6.0–15.0) 11.0 (6.0–14.0) 11.0 (7.0–15.0) 9.0 (5.0–14.0) 9.0 (5.0–14.0) <.0001
  1. + Cell size < 11 suppressed per VA policy
  2. ++ Suppressed cell size so one cannot calculate sample size for cells with n < 11
  3. aP-value based on Chi-square tests for categorical variables and Kruskal-Wallis tests for continuous variables
  4. bSingle or unknown marriage status not shown due to small cell sizes