Table 2

Adjusted analysis of relative odds (95% CLs) of treatment for colorectal cancer starting >30 days of diagnosis by treatment type, stage and socioeconomic factors: South Australian major public hospitals, 2000–2010 diagnoses*

Surgery (surgery cases)Radiotherapy (radiotherapy cases)Chemotherapy (chemotherapy cases)Any treatment (surgery cases)
NRO (95% CLs)nRO (95% CLs)nRO (95% CLs)nRO (95% CLs)
Age at diagnosis (years)
 <50 (ref.)911.00791.001891.00911.00
 50–592101.15 (0.68 to 1.95)1181.06 (0.52 to 2.15)3221.18 (0.71 to 1.94)2101.20 (0.70 to 2.05)
 60–693881.16 (0.71 to 1.90)1881.16 (0.60 to 2.25)4981.25 (0.79 to 2.00)3881.26 (0.76 to 2.08)
 70–795700.95 (0.59 to 1.53)1751.13 (0.58 to 2.22)4691.51 (0.93 to 2.45)5701.20 (0.73 to 1.95)
 80+4160.82 (0.50 to 1.34)561.09 (0.44 to 2.73)782.20 (0.95 to 5.10)4161.04 (0.63 to 1.72)
Sex
 Male (ref.)8931.004001.009101.008931.00
 Female7820.85 (0.69 to 1.05)2160.72 (0.47 to 1.11)6461.08 (0.80 to 1.47)7820.88 (0.72 to 1.09)
Socioeconomic
 Low (ref.)5441.002061.005071.005441.00
 Low-medium3881.17 (0.87 to 1.59)1370.73 (0.40 to 1.33)3740.92 (0.61 to 1.39)3881.14 (0.84 to 1.54)
 Medium-high3451.06 (0.78 to 1.42)1280.55 (0.30 to 1.01)3200.89 (0.58 to 1.38)3450.98 (0.73 to 1.32)
 High3981.05 (0.77 to 1.42)1450.78 (0.42 to 1.46)3550.94 (0.61 to 1.45)3981.05 (0.77 to 1.42)
Accessibility
 High (ref.)13531.004751.0012231.0013531.00
 Medium-high2280.62 (0.36 to 1.08)941.28 (0.45 to 3.65)2280.78 (0.30 to 2.00)2280.75 (0.43 to 1.31)
 Poor940.83 (0.45 to 1.52)471.14 (0.36 to 3.58)1050.60 (0.23 to 1.57)940.89 (0.49 to 1.63)
Local health network
 Northern metro (ref.)2421.001061.002481.002421.00
 Central metro6180.55 (0.39 to 0.76)2020.90 (0.47 to 1.72)4950.99 (0.62 to 1.57)6180.56 (0.40 to 0.78)
 Southern metro4170.44 (0.31 to 0.63)1340.68 (0.35 to 1.33)4260.84 (0.52 to 1.35)4170.44 (0.30 to 0.63)
 Country South1550.86 (0.51 to 1.43)740.52 (0.20 to 1.38)1592.40 (0.90 to 6.39)1550.78 (0.47 to 1.30)
 Country North2410.78 (0.43 to 1.43)1001.60 (0.49 to 5.18)2282.03 (0.76 to 5.39)2410.73 (0.40 to 1.34)
Tumour site
 Colon (ref.)10981.00861.008981.0010981.00
 Rectum (including rectosigmoid)5772.07 (1.66 to 2.57)5300.40 (0.19 to 0.83)6580.65 (0.48 to 0.89)5771.76 (1.41 to 2.19)
ACPS stage
 A (ref.)2801.00501.00471.002801.00
 B6540.87 (0.64 to 1.17)1471.03 (0.46 to 2.28)2491.78 (0.81 to 3.90)6540.80 (0.59 to 1.08)
 C4120.99 (0.72 to 1.37)2311.56 (0.72 to 3.38)6963.93 (1.85 to 8.36)4120.89 (0.65 to 1.23)
 D2790.65 (0.45 to 0.93)1620.71 (0.33 to 1.55)5160.83 (0.40 to 1.71)2790.56 (0.38 to 0.80)
 UK500.67 (0.31 to 1.48)260.93 (0.28 to 3.06)480.84 (0.27 to 2.62)500.65 (0.33 to 1.25)
Grade
 Well diff. (ref.)581.00251.00371.00581.00
 Mod diff.12120.68 (0.39 to 1.20)4291.34 (0.50 to 3.58)10541.18 (0.43 to 3.22)12120.72 (0.42 to 1.25)
 Poorly undiff.2850.47 (0.25 to 0.87)990.87 (0.62 to 5.67)3091.28 (0.45 to 3.68)2850.52 (0.28 to 0.95)
 UK1201.48 (0.75 to 2.95)631.02 (0.33 to 3.12)1560.41 (0.14 to 1.17)1201.44 (0.74 to 2.81)
Diagnosis year
 2000–20058691.003351.007821.008691.00
 2006–20108061.82 (1.48 to 2.24)2811.48 (0.97 to 2.26)7740.65 (0.48 to 0.89)8061.86 (1.51 to 2.29)
  • *Derived from multivariate logistic regression (see ‘Methods’).

  • ACPS, Australian Clinico-Pathological Staging; CLs, confidence limits; diff., differentiated; ref., reference; RO, relative odds; UK, unknown; undiff., undifferentiated.