Table 3. Factors associated with radiotherapy receipt among rectal cancer patients diagnosed during 1994–2002: observed and adjusted percentages, multivariate ORsa with 95% CIs, and P-values.
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Stage II (n=1143)
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Stage III (n=1297)
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Stage IV (n=1106)
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Stage unknown (n=1204)
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| obs% | adj% | OR (95% CI) | obs% | adj% | OR (95% CI) | obs% | adj% | OR (95% CI) | obs% | adj% | OR (95% CI) | |
| Sex | ||||||||||||
| Male | 35 | 31 | 1 (ref) | 45 | 43 | 1 (ref) | 25 | 23 | 1 (ref) | 26 | 19 | 1 (ref) |
| Female | 27 | 24 | 0.72 (0.53, 0.97) | 39 | 39 | 0.84 (0.65, 1.09) | 20 | 20 | 0.84 (0.62, 1.16) | 21 | 17 | 0.89 (0.65, 1.21) |
| P=0.028 | P=0.193 | P=0.297 | P=0.452 | |||||||||
| Age | ||||||||||||
| <55 | 48 | 46 | 1 (ref) | 64 | 65 | 1 (ref) | 33 | 32 | 1 (ref) | 51 | 48 | 1 (ref) |
| 55–64 | 42 | 41 | 0.81 (0.53, 1.25) | 48 | 47 | 0.48 (0.33, 0.70) | 27 | 26 | 0.77 (0.50, 1.18) | 36 | 32 | 0.51 (0.31, 0.85) |
| 65–74 | 36 | 35 | 0.62 (0.41, 0.94) | 45 | 45 | 0.45 (0.31, 0.64) | 24 | 24 | 0.66 (0.45, 0.97) | 30 | 25 | 0.37 (0.23, 0.60) |
| 75+ | 13 | 11 | 0.15 (0.09, 0.24) | 22 | 21 | 0.14 (0.09, 0.21) | 14 | 13 | 0.33 (0.21, 0.53) | 11 | 9 | 0.11 (0.07, 0.18) |
| P<0.001 | P<0.001 | P<0.001 | P<0.001 | |||||||||
| Marital status | ||||||||||||
| Married | — | 48 | 44 | 1 (ref) | — | — | ||||||
| Not married/ unknown | — | 35 | 38 | 0.77 (0.60, 1.01) | — | — | ||||||
| P=0.055 | ||||||||||||
| Tumour extent | ||||||||||||
| T1 | — | 28 | 22 | 0.41 (0.16, 1.08) | — | 7 | 4 | 0.09 (0.04, 0.20) | ||||
| T2 | — | 40 | 39 | 0.94 (0.66, 1.33) | — | 21 | 15 | 0.41 (0.22, 0.75) | ||||
| T3 | 31 | 27 | 1 (ref) | 43 | 41 | 1 (ref) | — | 40 | 31 | 1 (ref) | ||
| T4 | 42 | 39 | 1.70 (1.14, 2.53) | 48 | 48 | 1.35 (0.93, 1.96) | — | 41 | 40 | 1.50 (0.88, 2.54) | ||
| Missing | — | 47 | 54 | 1.73 (0.56, 5.33) | — | 21 | 18 | 0.50 (0.33, 0.75) | ||||
| P=0.009 | P=0.124 | P<0.001 | ||||||||||
| Year of diagnosis | 1.21 (1.15, 1.28) | 1.19 (1.13, 1.25) | 1.14 (1.08, 1.21) | 1.21 (1.13, 1.29) | ||||||||
| P<0.001 | P<0.001 | P<0.001 | P<0.001 | |||||||||
CI=confidence interval; OR=odds ratio.
a
Odds ratios adjusted for factors shown in relevant columns. Stage II, III, and unknown stage disease are also adjusted for health board. Stage IV and unknown stage disease are also adjusted for grade.