Table 3.
Risk of incident kidney stones by sex across categories of calendar time
| Men | Women | |
|---|---|---|
| <1990 | ||
| Cases | 498 | 520 |
| Person-years | 167 577 | 450 711 |
| Incidence ratea | 297 | 115 |
| HR (95% CI) | 2.69 (2.37, 3.06) | 1.00 (Ref.) |
| 1990–1994 | ||
| Cases | 691 | 1520 |
| Person-years | 233 742 | 1 055,81 |
| Incidence ratea | 296 | 144 |
| HR (95% CI) | 2.55 (2.30, 2.84) | 1.00 (Ref.) |
| 1995–1999 | ||
| Cases | 443 | 1707 |
| Person-years | 151 573 | 1 034 935 |
| Incidence ratea | 292 | 165 |
| HR (95% CI) | 2.44 (2.15, 2.76) | 1.00 (Ref.) |
| 2000–2004 | ||
| Cases | 462 | 1610 |
| Person-years | 184 830 | 957 218 |
| Incidence ratea | 250 | 168 |
| HR (95% CI) | 2.05 (1.81, 2.31) | 1.00 (Ref.) |
| 2005–2009 | ||
| Cases | 239 | 1421 |
| Person-years | 108 120 | 886 403 |
| Incidence ratea | 221 | 160 |
| HR (95% CI) | 2.02 (1.72, 2.38) | 1.00 (Ref.) |
| ≥2010 | ||
| Cases | 59 | 1132 |
| Person-years | 37 382 | 604 377 |
| Incidence ratea | 158 | 187 |
| HR (95% CI) | 1.67 (1.22, 2.29) | 1.00 (Ref.) |
The estimates are age-adjusted as age is the time axis for the survival analysis. aNumber of events per 100 000 person-years