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Table 1 Characteristics of the study population overall and by Aboriginal status, NSW Cancer Registry 2000–2008

From: After accounting for competing causes of death and more advanced stage, do Aboriginal and Torres Strait Islander peoples with cancer still have worse survival? A population-based cohort study in New South Wales

 

All (n = 301,356)a

Aboriginal (n = 2517)

 

Non-Aboriginal (n = 260,075)

  
 

n (%)

n (CC %)

(MI %)b

n (CC %)

(MI %)b

P valuec

Males

168,326 (55.9)

1313 (52.2)

(52.0)

144,109 (55.4)

(55.9)

Χ2 (1) p = 0.001

Age at diagnosis

     

Χ2 (8) p < 0.001; MW(z) = 24.3, p < 0.001

 0–39

17,031 (5.7)

263 (10.5)

(11.0)

13,398 (5.2)

(5.6)

 

 40–49

24,538 (8.1)

360 (14.3)

(14.9)

19,810 (7.6)

(8.1)

 

 50–59

50,578 (16.8)

570 (22.7)

(22.7)

42,361 (16.3)

(16.7)

 

 60–64

34,754 (11.5)

358 (14.2)

(14.1)

29,730 (11.4)

(11.5)

 

 65–69

38,813 (12.9)

288 (11.4)

(11.3)

33,548 (12.9)

(12.9)

 

 70–74

40,688 (13.5)

290 (11.5)

(11.4)

35,587 (13.7)

(13.5)

 

 75–79

40,276 (13.4)

210 (8.3)

(7.9)

35,701 (13.7)

(13.4)

 

 80–84

30,592 (10.2)

103 (4.1)

(4.0)

27,658 (10.6)

(10.2)

 

 85+

24,086 (8.0)

75 (3.0)

(2.9)

22,282 (8.6)

(8.0)

 

Residential remoteness

     

Χ2 (3) p < 0.001; MW(z) = −30.3, p < 0.001

 Major cities

204,781 (68.0)

1099 (43.7)

(43.5)

178,436 (68.6)

(68.2)

 

 Inner regional

71,652 (23.8)

789 (31.4)

(31.2)

60,863 (23.4)

(23.7)

 

 Outer regional

23,235 (7.7)

493 (19.6)

(19.7)

19,467 (7.5)

(7.6)

 

 Remote/ Very remote

1688 (0.6)

136 (5.4)

(5.7)

1309 (0.5)

(0.5)

 

SEIFA quintile

     

Χ2 (4) p < 0.001; MW(z) = −23.2,

p < 0.001

 1 (least disadvantaged)

62,971 (20.9)

192 (7.6)

(8.1)

54,552 (21.0)

(21.0)

 

 2

54,345 (18.0)

324 (12.9)

(13.0)

47,108 (18.1)

(18.1)

 

 3

61,341 (20.4)

484 (19.2)

(19.4)

52,517 (20.2)

(20.4)

 

 4

68,943 (22.9)

724 (28.8)

(28.3)

59,245 (22.8)

(22.8)

 

 5 (most disadvantaged)

53,756 (17.8)

793 (31.5)

(31.3)

46,653 (17.9)

(17.7)

 

Stage at diagnosis

     

Χ2 (3) p < 0.001; MW(z) = −9.0, p < 0.001d

 Localised

124,907 (41.5)

834 (33.1)

(34.7)

102,624 (39.5)

(41.5)

 

 Regional

55,210 (18.3)

578 (23.0)

(21.7)

51,572 (19.8)

(18.3)

 

 Distant

43,660 (14.5)

552 (21.9)

(19.8)

42,367 (16.3)

(14.4)

 

 Unknown

77,579 (25.7)

553 (22.0)

(23.8)

63,512 (24.4)

(25.8)

 

Vital statuse

     

Χ2 (2) p < 0.001

 Alive

182,801 (60.7)

1172 (46.6)

(51.9)

144,476 (55.6)

(60.7)

 

 Died due to the cancer

89,465 (29.7)

1108 (44.0)

(39.6)

87,354 (33.6)

(29.6)

 

 Died due to other cause

29,090 (9.7)

237 (9.4)

(8.5)

28,245 (10.9)

(9.7)

 

Cancer site

     

Χ2 (13) p < 0.001

 Stomach

5794 (1.9)

73 (2.9)

(2.7)

5544 (2.1)

(1.9)

 

 Colorectalf

40,288 (13.4)

289 (11.5)

(11.0)

37,334 (14.4)

(13.4)

 

  Colon

25,794

176 (7.0)

 

23,832 (9.2)

  

  Rectum

14,494

113 (4.5)

 

13,502 (5.2)

  

 Liver

3433 (1.1)

50 (2.0)

(1.8)

3307 (1.3)

(1.1)

 

 Pancreas

6729 (2.2)

66 (2.6)

(2.3)

6539 (2.5)

(2.2)

 

 Lung

27,302 (9.1)

392 (15.6)

(14.2)

26,161 (10.1)

(9.0)

 

 Melanoma

30,166 (10.0)

70 (2.8)

(4.6)

16,966 (6.5)

(10.1)

 

 Breastg

37,266 (12.4)

331 (13.2)

(13.3)

32,754 (12.6)

(12.4)

 

 Cervix

2222 (0.7)

63 (2.5)

(2.6)

1908 (0.7)

(0.7)

 

 Uterus

5057 (1.7)

47 (1.9)

(1.8)

4620 (1.8)

(1.7)

 

 Prostate

48,071 (16.0)

226 (9.0)

(9.9)

38,712 (14.9)

(16.1)

 

 Kidney

8333 (2.8)

91 (3.6)

(3.6)

7478 (2.9)

(2.8)

 

 Bladder

6912 (2.3)

43 (1.7)

(1.6)

6527 (2.5)

(2.3)

 

 Ill-defined & unspecified & other rare

11,207 (3.7)

110 (4.4)

(4.1)

10,507 (4.0)

(3.7)

 

 Othersh

68,576 (22.8)

666 (26.5)

(26.3)

61,718 (23.7)

(22.7)

 
  1. CC complete-case, MI multiple imputation, MW Mann-Whitney test, SEIFA socio-economic index for areas (Index of relative socio-economic disadvantage was used in this study).
  2. aIncludes also cases with unknown Aboriginal status.
  3. bPercentage after imputing Aboriginal status.
  4. cΧ2 (df) = Pearson Chi square test (degrees of freedom) was used to test categorical differences and MW(z) = Mann-Whitney test (z value) to test for ordinal differences between Aboriginal and non-Aboriginal people using complete-case data.
  5. dUnknown category was excluded when Mann-Whitney test was conducted.
  6. eVital status at end of follow-up.
  7. fColorectal cancers grouped together and separately for colon (ICD-O-3 C18) and rectum cancers (ICD-O-3 C19-C21).
  8. g Includes 303 cases of male breast cancer.
  9. hAll other cancer sites categorised to this group.
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