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Table 2 Characteristics of the study population in BC, stratified by immigrant status and region of origin

From: Disparities in breast cancer diagnosis for immigrant women in Ontario and BC: results from the CanIMPACT study

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 (%)   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
  1. P-value <.001 for all variables for comparison of immigrants versus long-term residents