Table 3.

Rates of Mental Health Visits by Rate of Pre-Injury Use

Variable	Low utilizers*			High utilizers†
	Rate per 1,000 person years		ARR (95% CI)‡	Rate per 1,000 person years		ARR (95% CI)‡
	Pre-injury	Post-injury		Pre-injury	Post-injury
Any	45.1	170.71	3.72 (2.70–5.14)	6,516.9	5,179.8	0.72 (0.55–0.94)
Mood disorder	6.25	37.47	6.01 (2.84–12.70)	1,258.43	752.81	0.58 (0.38–0.89)
Substance abuse	22.90	80.50	3.46 (2.29–5.21)	4,104.12	2,820.22	0.66 (0.45–0.98)
Schizophrenia	3.47	23.59	6.73 (2.42–18.69)	865.17	876.40	0.91 (0.43–1.96)
Anxiety	12.49	25.68	2.02 (1.04–3.90)	337.08	528.09	1.45 (0.68–3.09)
Self-harm	0.69	11.80	17.01 (2.25–128.65)	314.61	494.38	1.48 (0.81–2.70)

^*≤1 pre-injury visit.

^†>1 pre-injury visit.

^‡Estimated using negative binomial generalized estimating equations accounting for clustering of events within quarters and paired observations before and after burn.

ARR, adjusted rate ratio.