Table 3 Socio-demographic and tumour characteristics associated with use of adjuvant radiotherapy
Use of radiotherapy | |||||
|---|---|---|---|---|---|
Characteristic | Total population (N = 1708) | Total (N = 1708) | NZ European (N = 1418) | Māori (N = 225) | |
n (%) | n (%)a | p | n (%)a | n (%)a | |
Overall | 1708 | 1491 (87.3) | 1255 (87.8) | 189 (84.0) | |
Age (yrs.) | <0.001 | ||||
< 40 | 79 (4.6) | 76 (96.2) | 50 (96.2) | 16 (94.1) | |
40-49 | 328 (19.2) | 302 (92.1) | 231 (93.9) | 52 (86.7) | |
50-59 | 499 (29.2) | 456 (91.4) | 377 (92.0) | 66 (90.4) | |
60-69 | 471 (27.6) | 417 (88.5) | 361 (90.5) | 45 (75.0) | |
70-79 | 218 (12.8) | 172 (78.9) | 161 (78.9) | 8 (72.7) | |
80+ | 113 (6.6) | 68 (60.2) | 65 (60.7) | 2 (50.0) | |
Diagnosis year | 0.003 | ||||
1999-2002 | 357 (20.9) | 296 (82.9) | 255 (83.9) | 30 (76.9) | |
2003-2006 | 506 (29.6) | 443 (87.5) | 396 (88.0) | 37 (86.0) | |
2007-2009 | 406 (23.8) | 354 (87.2) | 284 (87.4) | 50 (84.7) | |
2010-2012 | 439 (25.7) | 398 (90.7) | 310 (91.4) | 72 (85.7) | |
Deprivation | 0.006 | ||||
Dep 1-2 | 178 (10.4) | 167 (93.8) | 156 (94.0) | 5 (83.3) | |
Dep 3-4 | 186 (10.9) | 163 (87.6) | 140 (87.5) | 17 (94.4) | |
Dep 5-6 | 414 (24.2) | 364 (87.9) | 318 (88.1) | 37 (90.2) | |
Dep 7-8 | 491 (28.7) | 423 (86.2) | 356 (87.9) | 54 (77.1) | |
Dep 9-10 | 439 (25.7) | 374 (85.2) | 275 (84.4) | 76 (84.4) | |
Distance | 0.005 | ||||
< 10km | 546 (32.0) | 489 (89.6) | 409 (90.5) | 54 (85.7) | |
10-50km | 660 (38.6) | 579 (89.1) | 488 (88.1) | 70 (85.6) | |
50-100km | 428 (25.1) | 364 (85.0) | 310 (85.4) | 49 (83.1) | |
> 100km | 74 (4.3) | 59 (79.7) | 38 (79.2) | 16 (76.2) | |
Missing | |||||
Diagnostic type | <0.001 | ||||
Screen detected | 750 (43.9) | 698 (93.1) | 602 (93.3) | 76 (90.5) | |
Symptomatic | 958 (56.1) | 793 (82.8) | 643 (83.2) | 113 (80.1) | |
Hospital type | <0.001 | ||||
Private | 535 (31.3) | 488 (91.2) | 453 (91.5) | 25 (86.2) | |
Public | 1173 (68.7) | 1003 (85.5) | 792 (85.8) | 164 (83.7) | |
Surgery type | <0.001 | ||||
BCS | 1354 (79.3) | 1213 (89.6) | 1031 (89.7) | 143 (88.8) | |
Mastectomy | 354 (20.7) | 278 (78.5) | 214 (79.9) | 46 (71.9) | |
Grade | 0.493 | ||||
Grade I | 441 (25.8) | 381 (86.4) | 341 (87.0) | 27 (79.4) | |
Grade II | 865 (50.6) | 754 (87.2) | 626 (88.0) | 102 (82.9) | |
Grade III | 371 (21.7) | 331 (89.2) | 257 (89.2) | 56 (87.5) | |
Unknown | 31 (1.8) | 25 (80.6) | 21 (77.8) | 4 (100) | |
T stage | <0.001 | ||||
T1 | 1020 (59.7) | 915 (90.1) | 790 (90.1) | 98 (89.9) | |
T2 | 518 (30.3) | 437 (84.4) | 356 (85.8) | 57 (76.0) | |
T3 | 100 (5.9) | 79 (79.0) | 54 (76.1) | 20 (87.0) | |
T4 | 70 (4.1) | 58 (82.9) | 43 (84.3) | 14 (77.8) | |
N stage | 0.042 | ||||
0 | 1029 (60.3) | 900 (87.8) | 762 (87.8) | 106 (86.9) | |
1 | 363 (21.2) | 321 (88.9) | 266 (90.2) | 45 (83.3) | |
2+ | 316 (18.5) | 266 (84.2) | 215 (93.1) | 36 (76.6) | |
Charlson score | <0.001 | ||||
0 | 1456 (85.2) | 1312 (90.1) | 1111 (90.7) | 151 (85.8) | |
1+ | 252 (14.8) | 179 (71.0) | 134 (69.4) | 38 (77.6) | |