Table 7.

Risk of disability and disability characteristics of the study population.

Risk of disability in full population	Exposed (n = 50,254)	Unexposed (n = 50,254)	aRR*	95% CI
	%	%
Never evaluated for disability (ref)	90.49	91.34	1.00	–
Evaluated for disability	9.51	8.66	1.05	1.02–1.08
Disability characteristic	Exposed (n = 4,781)	Unexposed (n = 4,350)	aRR*	95% CI
	%	%
Disability disposition
Retired	47.08	45.49	1.01	0.95–1.08
Separated with severance (ref)	48.04	48.64	1.00	–
Separated w/out benefits	3.14	3.59	1.02	0.86–1.21
Fit	0.71	1.20	0.76	0.54–1.07
Other	1.02	1.06	0.99	0.75–1.32
Combined rating
0	7.84	6.78	1.09	0.97–1.23
10 (ref)	26.23	26.69	1.00	–
20	13.68	15.03	0.95	0.87–1.05
30	9.12	10.32	0.95	0.85–1.06
40	7.82	6.67	1.07	0.95–1.20
50	9.16	8.67	1.00	0.90–1.12
60	6.59	6.21	1.03	0.91–1.17
70	7.74	6.87	1.04	0.92–1.17
80	2.95	3.08	0.97	0.81–1.16
90	1.23	1.01	1.06	0.81–1.38
100	2.26	2.60	0.95	0.78–1.16
Unrated	4.48	5.24	0.98	0.84–1.13
Missing	0.90	0.83	–	–
Rating by disability eligibility
<30% (ref)	53.23	54.71	1.00	–
≥30% (disability retirement)	46.77	45.29	1.01	0.95–1.08
# of conditions evaluated (mean ± SD)	1.77 ± 1.21	1.71 ± 1.12	1.02	0.99–1.04
Time in service to disability evaluation in years (mean ± SD)	4.65 ± 3.09	4.86 ± 3.08	0.98	0.97–0.99

^*Adjusted models control for race and education at military entry.