Table 6.

Rates of mental health physician claims for injured and non-injured cohorts, with rate ratios and 95% confidence intervals, by injury type and injury severity

			Number of Mental Health Physician Claims
Injury Types and Severity Level			Injured (N = 21,032)			Non-Injured (N = 21,032)			Unadjusted Rate Ratio	95% Confidence Interval	Adjusted Rate Ratio *	95% Confidence Interval
	N	%	Claims	%	/10 PYs	Claims	%	/10 PYs
Injury Subgroup
Brain injury	1,290	6.1	7,509	4.6	7.05	3,760	5.7	3.32	2.18	1.80–2.60	1.92	1.63–2.27
Spinal injury	95	0.5	114	0.1	1.38	211	0.3	2.47	0.68	0.39–1.17	0.82	0.51–1.33
Burns	524	2.5	3,837	2.3	8.33	1,235	1.9	2.77	3.12	2.30–4.23	2.02	1.53–2.67
Fracture of long bones	2,515	12	13,409	8.2	6.04	7,530	11.5	3.40	1.82	1.60–2.07	1.27	1.12–1.43
Poisonings	2,169	10.3	56,689	34.7	30.48	9,273	14.1	4.79	7.04	6.28–7.89	2.43	2.18–2.72
Internal injuries	593	2.8	4,257	2.6	8.29	1,841	2.8	3.60	2.33	1.79–3.03	1.57	1.25–1.98
All other injuries	13,846	65.8	77,650	47.5	6.30	41,809	63.7	3.43	1.93	1.83–2.04	1.41	1.34–1.48
Injury Severity Score (ISS)
Minor (ISS 1–8)	14,599	69.4	80,629	49.3	6.17	42,499	64.7	3.31	1.94	1.84–2.05	1.38	1.31–1.44
Moderate (ISS 9–15)	1,746	8.3	8,009	4.9	5.32	5,515	8.4	3.60	1.49	1.28–1.73	1.24	1.09–1.43
Severe (ISS = 16)	657	3.1	4,620	2.8	9.35	1,861	2.8	3.20	3.28	2.55–4.22	2.58	2.04–3.26
No ISS Computed †	4,030	19.2	70,207	42.9	20.27	15,784	24.0	4.42	5.05	4.60–5.54	2.03	1.87–2.21

* Adjusted for age, gender, place of residence, and comorbidities in 12 months prior to injury date (including CCI, cumulative LOS, number of physician claims, pre-existing psychiatric condition, pre-existing musculoskeletal condition and previous injuries)

^† ISS scores not computed for ICD-9-CM codes 930–939 foreign bodies; 958 complications; 960–979 poisonings; 980–989 toxic substances; 990–995 other.