Table 3 Observed (O) and expected* (E) number of suicides, standardised mortality ratio* (SMR) and 95% CI for Army males aged 16–24 years, 1986–2007

Age (years)	O	E	SMR	95% CI
16	–	1.33	–	–
17	14	7.77	180	99 to 302
18	27	16.08	168	111 to 244
19	27	22.37	121	80 to 176
20	32	29.11	110	78 to 155
21	28	32.13	87	58 to 126
22	31	33.19	93	66 to 133
23	25	34.42	73	47 to 107
24	24	31.39	76	49 to 114

*Standardised by calendar year (1986, 1987, …, 2007).