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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).