Appendix B.

Unadjusted and adjusted analyses: factors associated with repeat visit within 6 months of index visit (N = 4,976)

	Unadjusted		Adjusted
Covariates	OR [95% CI]	p value	OR [95% CI]	p value
Age
<10 years	[reference]		[reference]
10–13 years	1.48 [1.1–2.0]	0.01	1.29 [0.95–1.75]	0.1
14–17 years*	1.83 [1.39–2.41]	<0.001	1.42 [1.07–1.89]	0.016
Female sex *	1.32 [1.14–1.51]	<0.001	1.19 [1.03–1.38]	0.019
Risk assessment by psychiatry***	1.83 [1.6–2.1]	<0.001	1.63 [1.35–1.96]	<0.001
Weekend presentation	0.89 [0.75–1.07]	0.217	0.9 [0.75–1.08]	0.253
Overnight presentation	0.91 [0.76–1.08]	0.289	0.84 [0.7–1.01]	0.063
Admission to hospital:
None	[reference]		[reference]
Mental health assessment unit	1.35 [1.15–1.58]	<0.001	0.91 [0.74–1.12]	0.372
Inpatient psychiatry ***	2.53 [2.05–3.12]	<0.001	1.67 [1.3–2.14]	<0.001
Other inpatient unit	1.75 [1.29–2.38]	<0.001	1.35 [0.98–1.86]	0.066
Anxiety diagnosis *	0.67 [0.53–0.86]	<0.001	0.76 [0.6–0.98]	0.035
Depression diagnosis	1.48 [1.29–1.69]	<0.001	1.15 [0.98–1.33]	0.081
Female sex*Depression diagnosis*	1.72 [1.43–2.07]	<0.001	1.3 [1.06–1.59]	0.011
Male sex*Depression diagnosis	1.17 [0.92–1.47]	0.197	0.93 [0.73–1.19]	0.589
Acute stress	0.76 [0.61–0.94]	0.011	0.99 [0.79–1.24]	0.922
Self-harm	0.83 [0.65–1.07]	0.146	0.82 [0.63–1.06]	0.125
Mania or psychosis	1.15 [0.79–1.69]	0.463	0.93 {0.63–1.38]	0.731
Violence	0.85 [0.41–1.75]	0.651	1.01 [0.48–2.12]	0.973
Substance use	1.03 [0.66–1.61]	0.906	1.14 [0.72–1.82]	0.571
Behavioural	0.86 [0.41–1.75]	0.651	1.01 [0.48–2.12]	0.973
Medical illness	0.53 [0.32–0.87]	0.012	0.69 [0.31–1.14]	0.143

OR = Odds Ratio, CI = Confidence Interval

For adjusted analyses:

^***p < 0.001,

^**p < 0.01,

^*p < 0.05

Note: For unadjusted analyses, each covariate was entered into the model individually. For adjusted analyses, covariates were entered into the model controlling for age, sex, risk assessment by psychiatry, weekend presentation, overnight presentation, and location of admission to hospital.