The relative risk, 95% confidence intervals and significance of developing complications in those under, relative to over, a given age
| Age (y) | Relative risk (under versus over that age) | 95% Confidence intervals | p Value |
| <35 | 2.6 | 0.65–11.2 | 0.18 |
| <45 | 1.15 | 0.3–4.42 | 0.70 |
| <55 | 1.73 | 0.85–3.53 | 0.14 |
| <65 | 0.83 | 0.41–1.67 | 0.74 |