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Table 4 Multivariate competing risks regression analysis for risk of CRC death, all CRC patients

From: Sociodemographic disparities in survival from colorectal cancer in South Australia: a population-wide data linkage study

   CRC death/ no. at risk All CRC (n = 4365)
HR 95 % CI p-value
Site Colon 923/2847 1.00 - -
Rectum 487/1518 0.85 0.74-0.98 0.022
Stage dukes A 55/933 1.00 - -
B 250/1438 2.97 2.21-3.99 0.000
C 520/1345 7.74 5.75-10.4 0.000
D 585/649 34.1 25.0-46.5 0.000
Grade Low 10/114 1.00 - -
Intermediate 826/3137 1.22 0.72-2.07 0.453
High 405/825 2.25 1.32-3.84 0.003
Unknown 159/289 2.09 1.20-3.64 0.010
Age group 50-59 298/901 1.00 - -
60-69 467/1552 1.04 0.89-1.21 0.600
70-79 645/1942 1.12 0.96-1.29 0.146
Sex Female 585/1867 1.00 - -
Male 825/2498 1.07 0.95-1.20 0.243
Private Insurance No 686/1985 1.00 - -
Yes 724/2380 0.95 0.84-1.06 0.335
Comorbidity None 941/3068 1.00 - -
One (not severe) 248/779 0.90 0.78-1.05 0.194
Multiple / severe 221/518 1.21 1.02-1.44 0.033
SES quintile Low 382/1072 1.00 - -
Low-mid 280/878 0.94 0.80-1.11 0.443
Middle 246/791 0.93 0.78-1.10 0.379
Mid-high 276/843 1.06 0.90-1.25 0.508
High 226/781 0.75 0.62-0.91 0.004
Residence Urban 1007/3102 1.00 - -
Outer urban 122/429 0.95 0.79-1.16 0.638
Rural 47/188 0.98 0.82-1.17 0.830
Remote 93/242 1.12 0.90-1.39 0.324
Surgerya No 230/295 1.00 - -
Yes 1180/4070 0.51 0.42-0.62 0.000
Radiotherapya No 1141/3757 1.00 - -
Yes 36/269 1.41 1.18-1.68 0.000
Chemotherapya No 632/2745 1.00 - -
Yes 778/1620 0.87 0.76-1.00 0.047
Diagnosis year (continuous) 1410/4365 0.95 0.92-0.98 0.002
  1. CRC patients age 50-79 years diagnosed in South Australia 2003–3008
  2. Analysis with multiply imputed stage and grade, where missing, revealed similar results (i.e. identical patterns with regard to significant associations and approximately equivalent point estimates for all HRs)
  3. aTreatments received within 12 months of diagnosis
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