TABLE 2—
Incidence and Relative Risk of Nonfatal Hospitalization for Self-Injury, by Exposure: New Zealand, 1998
| Group | No. | No. Hospitalized for Self-Injurya | Incidence Rate per 100 000 Personsb | Relative Riskc(95% Confidence Interval) |
| Total population | 3 761 010 | 3625 | 82.6 | . . . |
| Previous hospitalization | ||||
| Noned | 3 711 327 | 2637 | 71.0 | 1.0 |
| Any injury | 49 683 | 494 | 1 434.5 | 20.5 (18.8, 22.3) |
| Self-injury | 2 728 | 341 | 11 096.6 | 175.7 (155.0, 199.1) |
| Assault | 2 517 | 20 | 646.7 | 9.2 (5.6, 14.9) |
| Unintentional | 44 269 | 128 | 399.3 | 5.6 (4.8, 6.6) |
| Undetermined | 169 | 5 | 962.2 | 13.7 (2.9, 64.1) |
aExcludes self-injury resulting in death.
bAge and sex adjusted, incidence per 100 000 person-years.
cAge and sex adjusted, calculated via Mantel–Haenszel method.
dIncludes those whose 1997 exposure injury was an exclusion and those in 1998 with assaultive injury but no 1997 exposure.