Mental health: A cause or consequence of injury? A population-based matched cohort study

BMC Public Health

Table 3 Rates of post-injury mental health hospitalisations, for injured and non-injured cohorts, with rate ratios and 95% confidence intervals, by severity of pre-existing mental health condition

Pre-existing Mental Health Condition	Injured			Non-Injured			Unadjusted Rate Ratio	95% Confidence Interval	Adjusted Rate Ratio *	95% Confidence Interval
	N	Hosp	Rate /10 PYs	N	Hosp	Rate /10 PYs
No condition ^a	16,984	1,778	0.12	19,089	551	0.03	3.67	3.19–4.23	3.25	2.81–3.76
Mild condition ^b	2,550	1,018	0.46	1,520	175	0.13	3.59	2.80–4.61	3.19	2.46–4.12
Moderate-severe ^c	1,498	3,238	2.61	423	231	0.62	4.11	3.20–5.28	3.12	2.42–4.01
Total	21,032	6,034	0.33	21,032	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 musculoskeletal condition and previous injuries)
^a No admissions or physician claims for that condition in pre-injury period
^b 1–3 physician claims and no admissions for that condition in pre-injury period
^c 1 or more admissions and/or 4 or more physician claims for that condition in pre-injury period

ISSN: 1471-2458