Table 1.

Rates of mental health hospitalisations for injured and non-injured cohorts, with rate ratios and 95% confidence intervals, by time periods

	Number of Mental Health Hospitalisations
Time Period	Injured (N = 21,032)		Non-Injured (N = 21,032)		Unadjusted Rate Ratio	95% Confidence Interval	Adjusted Rate Ratio *	95% Confidence Interval
	Hosp	Rate /10 PYs	Hosp	Rate /10 PYs
Year prior	884	0.42	95	0.05	9.31	7.35–11.77	na	na
Year 1	939	0.46	106	0.05	8.86	7.09–11.08	3.99	3.18–5.01
Year 2	674	0.34	106	0.05	6.27	4.95–7.96	2.88	2.27–3.66
Year 3	641	0.33	88	0.05	7.23	5.62–9.29	3.63	2.82–4.68
Year 4	590	0.31	96	0.05	6.21	4.84–7.96	3.21	2.49–4.12
Year 5	588	0.31	86	0.05	6.94	5.34–9.01	3.77	2.90–4.90
Year 6	546	0.30	120	0.07	4.53	3.57–5.75	2.56	2.02–3.25
Year 7	515	0.29	90	0.05	5.82	4.49–7.55	2.98	2.29–3.87
Year 8	550	0.31	97	0.05	5.68	4.37–7.39	2.66	2.05–3.46
Year 9	496	0.29	92	0.05	5.47	4.18–7.15	2.91	2.22–3.81
Year 10	495	0.31	76	0.05	6.57	4.92–8.77	3.45	2.58–4.62
Total	6,034	0.33	957	0.05	6.56	5.87–7.34	3.24	2.92–3.60

* 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)