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Table 2 Factors associated with CRC. Adjusted IRRs from Poisson regression. Calendar year and age as covariates

From: Long-term trends in colorectal cancer: incidence, localization, and presentation

  Male   Female  
IRR (CI) P value IRR (CI) P value
Total colorectal cancer n = 2173 a
 Calendar year 1.0133 (1.0078–1.0189) < 0.001 1.0127 (1.0068–1.0186) < 0.001
 Age (per 5 years) 1.0807 (1.0764–1.0850) < 0.001 1.0691 (1.0650–1.0732) < 0.001
Right sided colonic cancer n = 841
 Calendar year 1.0208 (1.0111–1.0306) < 0.001 1.0148 (1.0059–1.0238) 0.001
 Age (per 5 years) 1.0887 (1.0811–1.0964) < 0.001 1.0798 (1.0730–1.0866) < 0.001
Left sided colonic cancer n = 686
 Calendar year 1.0155 (1.0055–1.0256) 0.002 1.0093 (0.9990–1.0197) 0.077
 Age (per 5 years) 1.0797 (1.0721–1.0872) < 0.001 1.0627 (1.0557–1.0697) < 0.001
Rectal cancer n = 646
 Calendar year 1.0042 (0.9950–1.0136) 0.37 1.0130 (1.0013–1.0249) 0.030
 Age (per 5 years) 1.0743 (1.0674–1.0813) < 0.001 1.0607 (1.0528–1.06856) < 0.001
  1. a Ninety-five patients admitted to Levanger Hospital from the area of Namsos Hospital, mostly because of centralization of rectal cancer during the later years, have been excluded from these incidence analyses. They were not included because that area was not an original part of the primary population area of Levanger Hospital
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