Table 3

Cox proportional HRs for risk of mental health disorder excluding PTSD in veterans by age at recruitment, overall and by birth cohort, compared with all matched non-veterans

Age at entry (years)	≤17			18–19			≥20
Age at entry (years)	HR	95% CI	P value	HR	95% CI	P value	HR	95% CI	P value
Birth cohort
Overall	0.99	0.93 to 1.06	0.808	1.15	1.08 to 1.23	<0.001	1.21	1.11 to 1.32	<0.001
1945–1949	1.28	1.10 to 1.50	0.002	1.38	1.18 to 1.60	<0.001	1.41	1.20 to 1.66	<0.001
1950–1954	1.14	0.99 to 1.32	0.074	1.39	1.21 to 1.59	<0.001	1.46	1.24 to 1.70	<0.001
1955–1959	0.99	0.87 to 1.13	0.907	1.27	1.10 to 1.48	0.001	1.21	1.00 to 1.47	0.046
1960–1964	1.06	0.91 to 1.23	0.430	1.24	1.06 to 1.46	0.009	0.98	0.79 to 1.21	0.840
1965–1969	0.81	0.63 to 1.03	0.096	0.85	0.68 to 1.06	0.148	1.18	0.98 to 1.44	0.088
1970–1974	0.96	0.69 to 1.33	0.803	1.13	0.88 to 1.45	0.342	0.81	0.58 to 1.15	0.246
1975–1984	1.02	0.61 to 1.72	0.932	1.08	0.69 to 1.69	0.741	0.91	0.54 to 1.51	0.700

1985–1995 cohort: insufficient numbers.