Table 2 Characteristics of the study population in BC, stratified by immigrant status and region of origin
Variable | Value | Long-term residents | Immigrants | East Asia & Pacific | Eastern Europe & Central Asia | Latin America & Caribbean | Middle East & North Africa | South Asia | Sub-Saharan Africa | USA/New Zealand/Australia | Western Europe |
|---|---|---|---|---|---|---|---|---|---|---|---|
N (%) | Â | 12,520 (88.2) | 1678 (11.8) | 948 (6.7) | 121 (0.8) | 64 (0.5) | 93 (0.7) | 191 (1.4) | 56 (0.4) | 68 (0.5) | 137 (1.0) |
Primary care access variables | |||||||||||
 Baseline UPC index score | 0 visits | 933 (7.5) | 207 (12.3) | 117 (12.3) | 17 (14.1) | <=5 | 16–20 | 12 (6.3) | 6–10 | 6–10 | 19 (13.9) |
1–2 visits | 1694 (13.5) | 0 (0) | 153 (16.1) | 17 (14.1) | <=5 | <=5 | 19 (10.0) | <=5 | <=5 | 24 (17.5) | |
UPC < =.75 (low) | 4641(37.1) | 591 (35.2) | 322 (34.0) | 42 (34.7) | 25 (39.06) | 36 (38.7) | 69 (36.1) | 19 (33.9) | 24 (35.3) | 54 (39.4) | |
UPC > 0.75 (high) | 5252 (42.0) | 638 (38.0) | 356 (37.6) | 45 (37.2) | 28 (43.75) | 29 (31.2) | 91 (47.6) | 21 (37.5) | 28 (41.2) | 40 (29.2) | |
 Primary care visits in 6 mths prior to diagnosis | Mean ± SD | 3.3 ± 2.9 | 2.9 ± 2.4 | 2.8 ± 2.4 | 2.9 ± 2.4 | 2.6 ± 2.0 | 2.7 ± 2.4 | 2.8 ± 2.9 | 2.5 ± 1.9 | 3.0 ± 2.7 | 2.7 ± 2.4 |
Median (IQR) | 3 (1–4) | 2 (1–4) | 2 (1–4) | 2 (1–4) | 3 (1–4) | 2 (0–5) | 3 (2–5) | 2 (1–4) | 3 (1–4) | 2 (1–4) | |
Control variables | |||||||||||
 Age at diagnosis | Mean ± SD | 63.1 ± 13.6 | 53.4 ± 12.3 | 52.6 ± 11.8 | 54.6 ± 12.1 | 51. 8 ± 12.0 | 52.6 ± 10.9 | 54.6 ± 13.1 | 52.7 ± 13.0 | 52.1 ± 11.2 | 53.7 ± 13.3 |
 Co-morbidities (ADGs) | 0 -- 5 | 6916 (55.2) | 1092 (65.1) | 649 (68.5) | 74 (61.2) | 39 (60.9) | 58 (62.4) | 101 (52.9) | 36 (64.3) | 38 (55.9) | 97 (70.8) |
6 -- 9 | 4154 (33.2) | 468 (27.9) | 253 (26.7) | 37 (30.6) | 21–25 | 23 (24.7) | 65 (34.0) | 16–20 | 21–25 | 26 (19.0) | |
10 + | 1450 (11.6) | 118 (7.0) | 46 (4.9) | 10 (8.3) | <=5 | 12 (12.9) | 25 (13.1) | <=5 | <=5 | 14 (10.2) | |
 Income quintile | 1 (lowest) | 2247 (18.0) | 399 (23.8) | 245 (25.8) | 36 (29.8) | 16 (25) | 14 (15.1) | 53 (27.8) | 6–10 | 14 (20.6) | 11–15 |
2 | 2413 (19.3) | 389 (23.2) | 218 (23.0) | 23 (19.0) | 11 (17.2) | 18 (19.4) | 74 (38.7) | 6–10 | 6–10 | 30 (21.9) | |
3 | 2400 (19.2) | 336 (20.0) | 189 (19.9) | 23 (19.0) | 12 (18.8) | 18 (19.4) | 34 (17.8) | 17 (30.4) | 14 (20.6) | 29 (21.2) | |
4 | 2518 (20.1) | 247 (14.7) | 139 (14.7) | 16 (13.2) | 6–10 | 18 (19.4) | 20 (10.5) | 6–10 | 13 (19.1) | 23 (16.8) | |
5 | 2707 (21.6) | 257 (15.3) | 130 (13.7) | 17 (14.1) | 11–15 | 18 (19.4) | 6–10 | 16 (28.6) | 16 (23.5) | 41 (29.9) | |
Missing | 235 (1.9) | 50 (3.0) | 27 (2.9) | 6 (5.0) | <=5 | 7 (7.53) | <=5 | 0 (0) | <=5 | <=5 | |
Outcome variabels | |||||||||||
 Stage at diagnosis | I | 5297 (42.3) | 669 (39.9) | 396 (41.8) | 45 (37.2) | 29 (45.3) | 36 (38.7) | 51 (26.7) | 26 (46.4) | 26 (38.2) | 60 (43.8) |
II | 3974 (31.7) | 576 (34.3) | 329 (34.7) | 43 (35.5) | 19 (29.7) | 25 (26.9) | 85 (44.5) | 15 (26.8) | 23 (33.8) | 37 (27.0) | |
III | 1549 (12.4) | 254 (15.1) | 123 (13.0) | 23 (19.0) | 12 (18.8) | 19 (20.4) | 38 (19.9) | 8 (14.3) | 9 (13.2) | 22 (16.1) | |
IV | 542 (4.3) | 55 (3.3) | 21 (2.2) | <=5 | <=5 | <=5 | 7 (3.66) | 6–10 | <=5 | 7 (5.1) | |
Unknown | 1158 (9.3) | 124 (7.4) | 79 (8.3) | <=5 | <=5 | 6–10 | 10 (5.24) | <=5 | 6–10 | 11 (8.03) | |
 Screen-detected | n (%) screen-detected | 4470 (35.7) | 477 (28.4) | 259 (27.3) | 33 (27.3) | 27 (42.2) | 27 (42.2) | 61 (31.9) | 16 (28.6) | 16 (23.5) | 35 (25.6) |
 Diagnostic Interval (Screened patients) | Median (IQR) | 32 (17–55) | 30 (18–50) | 31 (18–50) | 41 (30–55) | 20 (14–45) | 26 (17–44) | 31 (16–47) | 38 (19–66) | 29 (20–51) | 28 (19–57) |
90th percentile | 81 | 84 | 85 | 87 | 70 | 76 | 73 | 98 | 80 | 80 | |
 Diagnostic Interval (Symptom-atic patients) | Median (IQR) | 30 (14–63) | 34 (15–72) | 35 (16–75) | 23 (11–57) | 38 (17–93) | 34 (15–73) | 41 (21–74) | 23 (11–63) | 29 (13–65) | 22 (11–69) |
90th percentile | 120 | 141 | 143 | 126 | 173 | 148 | 120 | 187 | 144 | 117 | |