Table 2.
Incidence rates (IR) and incidence rate ratios (IRR) for age, sex, era, and cancer sites between two age groups (n = 28,566).
| Patient Characteristics | (18–50 Years) | (>50 Years) | ||||
|---|---|---|---|---|---|---|
| n = 2129 | n = 26,437 | |||||
| * IR (95% CI) | IRR (95% CI) | p-Value | * IR (95% CI) | IRR (95% CI) | p-Value | |
| Overall | 10.60 (10.16–11.06) | 196.56 (194.20–198.94) | ||||
| Age (years) | - | 1.17 (1.16–1.18) | <0.001 | - | 1.05 (1.05–1.05) | <0.001 |
| Sex | ||||||
| Female | 9.42 (8.82–10.04) | Reference | - | 156.19 (153.30–159.11) | Reference | - |
| Male | 11.78 (11.12–12.46) | 1.25 (1.15–1.36) | <0.001 | 242.33 (238.51–246.21) | 1.55 (1.51–1.59) | <0.001 |
| Era | ||||||
| 1990–1999 | 9.13 (8.44–9.86) | Reference | - | 203.04 (198.61–207.53) | Reference | - |
| 2000–2009 | 10.19 (9.46–10.96) | 1.12 (1.00–1.24) | 0.04 | 190.74 (186.87–194.66) | 0.94 (0.91–0.97) | <0.001 |
| 2010–2017 | 12.89 (11.98–13.83) | 1.41 (1.27–1.57) | <0.001 | 197.16 (193.15–201.24) | 0.97 (0.94–1.00) | 0.06 |
| Cancer site | ||||||
| Colon & Rectum | 8.85 (8.44–9.27) | - | - | 159.27 (157.15–161.42) | - | - |
| Pancreas | 0.75 (0.63–0.88) | - | - | 16.08 (15.41–16.77) | - | - |
| Stomach | 0.63 (0.53–0.75) | - | - | 13.44 (12.83–14.08) | - | - |
| Oesophagus | 0.38 (0.30–0.47) | - | - | 7.76 (7.30–8.25) | - | - |
* IR is incidence per 100,000 South Australian residents. IRs were not reported for age and IRRs were not reported for cancer sites.