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Table 3 Cohort description and five year all-cause survival estimates for colorectal cancer patients, Queensland, 1997-2007

From: Comparing multilevel and Bayesian spatial random effects survival models to assess geographical inequalities in colorectal cancer survival: a case study

Sub group

N (%)

% Deaths

All-cause survival [95% CI]1

p

All patients in cohort

22,727

41.1

58.1 [57, 58]

 

Area-Remoteness Index of Australia (ARIA)

   

< 0.001

Major city

13,155 (57.9)

39.6

59.6 [59, 60]

 

Inner regional

5,139 (22.6)

41.4

57.8 [56, 59]

 

Outer regional

3,485 (15.3)

45.1

54.1 [52, 56]

 

Remote2

948 (4.2)

46.2

53.1 [50, 56]

 

Index of Relative socioeconomic advantage and disadvantage (IRSAD)

   

< 0.001

Quintile 5 (least disadvantaged)

3,193 (14.1)

36.4

62.8 [61, 65]

 

Quintile 4

5,101 (22.4)

38.9

60.2 [59, 62]

 

Quintile 3

6,075 (26.7)

41.0

58.2 [57, 59]

 

Quintile 2

5,335 (23.5)

44.5

54.6 [53, 56]

 

Quintile 1 (most disadvantaged)

3,023 (13.3)

43.8

55.4 [54, 57]

 

Age group

   

< 0.001

20 to 49

1,873 (8.2)

32.0

67.4 [65, 70]

 

50 to 59

3,938 (17.3)

32.8

66.7 [65, 68]

 

60 to 69

6,578 (28.9)

37.1

62.1 [61, 63]

 

70-79

7,718 (34.1)

45.6

53.5 [52, 55]

 

80-84

2,620 (11.5)

56.7

41.9 [40,44]

 

Gender

   

< 0.001

Male

12,879 (56.7)

42.9

56.2 [55, 57]

 

Female

9,848 (43.3)

38.8

60.6 [60, 62]

 

Indigenous status

   

< 0.001

Non Indigenous

20,868 (91.8)

43.1

56.1 [55, 57]

 

Indigenous

181 (0.8)

45.3

53.7 [45, 61]

 

Not stated

1,678 (7.4)

16.7

82.9 [81, 85]

 

Marital status

   

<0.001

Married

14,532 (63.9)

39.0

60.1 [59, 61]

 

Never married/single

1,541 (6.8)

46.5

52.6 [50, 55]

 

Widowed

3,951 (17.4)

48.2

51.1 [49, 52]

 

Divorced

1,822 (8)

44.4

54.7 [52, 57]

 

Separated

454 (2)

31.9

67.3 [63, 71]

 

Not stated

427 (1.9)

20.6

79.3 [75, 83]

 

Occupation category

   

< 0.001

Professional

4,783 (21.1)

48.6

50.6 [49, 52]

 

White collar

2,665 (11.7)

52.6

46.7 [44,49]

 

Blue collar

3,789 (16.7)

59.5

39.4 [38,41]

 

Not in labor force

7,529 (33.1)

33.5

65.9 [65, 67]

 

Not stated/Inadequately described

3,961 (17.4)

21.0

78.2 [77, 79]

 

Country of birth 3

   

< 0.001

Australia

17,367 (76.4)

41.9

57.2 [57, 58]

 

Other English-speaking

4,580 (20.2)

39.2

60.2 [59, 62]

 

Non-English-speaking

780 (3.4)

34.0

64.2 [61, 68]

 

Site 4

   

=0.003

Proximal (R) colon

7,874 (34.6)

41.8

57.5 [56, 59]

 

Distal (L) colon

5,865 (25.9)

39.5

59.6 [58, 61]

 

Colon NOS

1,299 (5.7)

54.0

45.3 [43,48]

 

Rectal

7,689 (33.8)

39.4

59.8 [59, 60]

 

Stage

   

< 0.001

Stage A

4,332 (19.1)

18.3

81.1 [80, 83]

 

Stage B

6,323 (27.8)

28.9

70.3 [69, 71]

 

Stage C

5,846 (25.7)

47.9

50.8 [50, 52]

 

Stage D

2,576 (11.3)

84.7

13.9 [12,15]

 

Unknown stage

3,650 (16.1)

47.4

51.9 [50, 54]

 

Differentiation

   

< 0.001

Well differentiated

1,107 (4.9)

31.9

67.3 [65, 70]

 

Moderately differentiated

13,953 (61.4)

36.7

62.4 [62, 63]

 

Poorly differentiated

4,206 (18.5)

52.9

46.2 [45,48]

 

Not stated

3,461 (15.2)

47.2

52.2 [50, 54]

 

Surgical margins

   

< 0.001

Clear

16,664 (73.4)

36.3

62.9 [62, 64]

 

Positive

530 (2.3)

39.8

59.7 [55, 61]

 

Unknown

5,533 (24.3)

55.7

43.6 [43,45]

 
  1. CI = confidence interval; p-values calculated using log-rank test for equality of survivor functions restricting follow-up to five years for each patient.
  2. 1. From Kaplan-Meir survival analysis.
  3. 2. Includes remote and very remote categories.
  4. 3. Other English-speaking: those born in New Zealand, United Kingdom, Ireland, or North America; non-English-speaking: those not born in Australia, New Zealand, United Kingdom, Ireland or North America.
  5. 4. Colorectal sites defined as proximal colon (ICDO3: C180 to C184), distal colon (ICDO3: C185-C187), unspecified colon (ICDO3: C188-C189) and rectal (ICDO3: C19-C20, C218).