Table 6.
Covariate fixed effects from multilevel discrete-time and Bayesian spatial survival models
| Variable | Multilevel model: OR (95% CrI) 1 | Spatial model: RR (95%CrI) 2 |
|---|---|---|
| Area-level variables | ||
| Area-Remoteness Index of Australia | ||
| Major city | 1.00 | 1.00 |
| Inner regional | 0.95 (0.88, 1.02) | 0.98 (0.89, 1.07) |
| Outer regional | 1.09 (1.01, 1.18) | 1.06 (1.01, 1.19) |
| Remote | 1.15 (1.02, 1.28) | 1.09 (1.01, 1.21) |
| Relative socioeconomic advantage and disadvantage | ||
| Most advantaged | 1.00 | 1.00 |
| Advantaged | 1.14 (1.03, 1.23) | 1.08 (1.01, 1.17) |
| Middle | 1.18 (1.08, 1.29) | 1.15 (1.06, 1.25) |
| Disadvantaged | 1.22 (1.11, 1.34) | 1.17 (1.07, 1.28) |
| Most disadvantaged | 1.23 (1.10, 1.36) | 1.18 (1.07, 1.32) |
| Individual-level variables | modeled at unit record | modeled as aggregated data |
| Age group | ||
| 20 to 49 | 0.24 (0.21, 0.27) | 0.29 (0.26, 0.32) |
| 50 to 59 | 0.29 (0.26, 0.32) | 0.35 (0.32, 0.38) |
| 60 to 69 | 0.42 (0.39, 0.46) | 0.48 (0.45, 0.52) |
| 70-79 | 0.68 (0.63, 0.73) | 0.73 (0.69, 0.77) |
| 80-85 | 1.00 | 1.00 |
| Gender | ||
| Male | 1.00 | 1.00 |
| Female | 1.08 (1.02, 1.14) | 1.07 (1.02, 1.13) |
| Marital status | ||
| Married | 1.00 | 1.00 |
| Never married/single | 1.33 (1.21, 1.46) | 1.31 (1.20, 1.40) |
| Widowed | 1.11 (1.03, 1.19) | 1.09 (1.02, 1.15) |
| Divorced | 1.18 (1.08, 1.29) | 1.16 (1.08, 1.25) |
| Separated | 0.94 (0.77, 1.13) | 0.95 (0.81, 1.15) |
| Not stated | 1.32 (1.02, 1.68) | 1.36 (1.08, 1.69) |
| Occupation category | ||
| Professional | 1.00 | 1.00 |
| White collar | 1.11 (1.02, 1.20) | 1.07 (1.01, 1.15) |
| Blue collar | 1.38 (1.29, 1.49) | 1.29 (1.22, 1.37) |
| Not in labor force | 0.46 (0.43, 0.50) | 0.52 (0.49, 0.56) |
| Not stated/Inadequately described | 0.35 (0.32, 0.39) | 0.39 (0.35, 0.42) |
| Country of birth | ||
| Australia | 1.00 | 1.00 |
| Other English-speaking | 0.96 (0.90, 1.02) | 0.95 (0.92, 1.00) |
| Non-English-speaking | 0.88 (0.76, 0.97) | 0.87 (0.78, 0.98) |
| Indigenous status | ||
| Non Indigenous | 1.00 | 1.00 |
| Indigenous | 1.16 (0.89, 1.49) | 1.12 (0.97, 1.38) |
| Not stated | 0.45 (0.39, 0.51) | 0.48 (0.42, 0.54) |
| Site | ||
| Proximal (R) colon | 1.02 (1.01, 1.08) | 1.06 (1.01, 1.11) |
| Distal (L) colon | 1.03 (0.96, 1.10) | 1.07 (1.01, 1.13) |
| Colon NOS | 1.04 (1.01, 1.16) | 1.08 (1.00, 1.18) |
| Rectal | 1.00 | 1.00 |
| Stage | ||
| Stage I | 1.00 | 1.00 |
| Stage II | 1.61 (1.47, 1.77) | 1.57 (1.44, 1.71) |
| Stage III | 3.17 (2.91, 3.45) | 2.85 (2.64, 3.10) |
| Stage IV | 11.41 (10.30, 12.57) | 7.88 (7.23, 8.59) |
| Unknown stage | 2.09 (1.86, 2.34) | 2.10 (1.91, 2.32) |
| Differentiation | ||
| Well differentiated | 1.00 | 1.00 |
| Moderately differentiated | 1.14 (1.01, 1.29) | 1.18 (1.06, 1.32) |
| Poorly differentiated | 1.64 (1.44, 1.87) | 1.65 (1.47, 1.85) |
| Not stated differentiation | 1.25 (1.09, 1.43) | 1.35 (1.20, 1.52) |
| Surgical margins | ||
| Clear | 1.00 | 1.00 |
| Positive | 1.42 (1.19, 1.66) | 1.37 (1.19, 1.57) |
| Unknown margin | 1.84 (1.68, 2.01) | 1.73 (1.61, 1.85) |
CrI Credible Interval OR Odds Ratios, RR Relative Risk ratios.
1. Estimates derived from best fitting fully adjusted Model 5 as described in text.
2. Estimates derived from best fitting fully adjusted Model 11 as described in text.