Table 2 Relationship between incidence rates (IRR) and their 95% confidence intervals, for potential risk factors
From: Tumors after kidney transplantation: a population study
| Â | Neoplasm | |
|---|---|---|
IRR | IC95% | |
Sex | ||
 Women | 1 |  |
 Men | 1.24 | 0.52–2.80 |
Age (years) | Â | |
 < 50 | 1 |  |
 > 50 | 3.4 | 1.2–9.7 |
Years post-transplant | ||
 > 3 anni | 1 |  |
 < 3 anni | 4.25 | 1.5–12 |