TABLE 3—

Incidence and Relative Risk of Suicide, by Exposure: New Zealand, 1998

Group	No.	No. Fatal Self-Injuriesa	Incidence Rate per 100 000 Personsb	Relative Riskc(95% Confidence Interval)
Total population	3 761 010	644	15.4	. . .
Previous hospitalization
Noned	3 711 327	520	14.0	1.0
Any injury	49 683	62	155.3	11.1 (8.7, 14.1)
Self-injury	2 728	39	1457.5	105.4 (76.2, 145.9)
Assault	2 517	5	145.7	10.4 (3.7, 29.1)
Unintentional	44 269	12	25.4	1.8 (1.0, 3.3)
Undetermined	169	6	2251.0	164.1 (59.2, 455.2)

^aExcludes nonfatal self-injury resulting in hospitalization.

^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.