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Table 3 Total population Incidence Rate Ratios by sex and site of disease

From: The incidence of early onset colorectal cancer in Aotearoa New Zealand: 2000–2020

  

Female

Male

Age (years)

Site

IRR

IRR

< 50

Proximal

1.14 (1.02,1.28)*

1.20 (1.07,1.35)**

 

Distal

1.29 (1.17,1.41)***

1.35 (1.24,1.48)***

 

Rectal

1.25 (1.18,1.32)***

1.32 (1.25,1.39)***

50–79

Proximal

0.77 (0.74,0.79)***

0.81 (0.78,0.83)***

 

Distal

0.83 (0.79,0.86)***

0.87 (0.84,0.91)***

 

Rectal

0.81 (0.79,0.84)***

0.86 (0.84,0.88)***

80+

Proximal

1.04 (1.00,1.08)

1.09 (1.05,1.14)***

 

Distal

0.92 (0.87,0.97)*

0.97 (0.92,1.02)

 

Rectal

0.86 (0.81,0.90)***

0.90 (0.85,0.95)***

  1. Incidence Rate Ratio over 10 years with 95% confidence intervals.* P < 0.05, ** P < 0.005, *** P < 0.0005