Table 1. Demographic characteristics.

	All individuals with follow-up data		Mood disorder at follow-up		No mood disorder at follow-up		P-value
	(n=69)		(n=26)		(n=43)
	Mean	s.d.	Mean	s.d.	Mean	s.d.
Age at baseline (years)	16.3	1.8	16.3	1.7	16.4	1.8	0.879a
	N	%	N	%	N	%
Sex (female)	47	68.1	17	65.4	30	69.8	0.705b
Alcohol							0.577c
Less than weekly	40	58.0	16	61.5	24	55.8
1-6 drinks per week	18	25.7	5	18.5	13	30.2
Daily	11	15.7	5	18.5	6	14.0
Cannabis							0.060c
No	58	84.1	21	80.8	37	86.0
<2 g per week	7	10.0	5	18.5	2	4.7
>2 g per week	4	5.7	0	0.0	4	9.3
Smoking	35	50.7	16	61.5	19	44.2	0.162b
Any illicit drug	13	18.6	5	7.1	8	11.4	0.599c
	Mean	s.d.	Mean	s.d.	Mean	s.d.
MADRS score baseline	18.0	8.9	20.5	8.6	16.7	8.9	0.093a
MADRS score long-term follow-up	14.4	11.0	17.2	9.8	12.9	11.5	0.164a
GAF score baseline	60.2	12.9	56.9	11.1	62.2	13.6	0.099a
GAF score long-term follow-up	66.2	16.7	58.1	13.2	71.1	16.9	0.001a

Abbreviations: GAF, Global Assessment of Functioning; MADRS, Montgomery–Asberg Depression Rating Scale.

^aIndependent samples t-test.

^bChi-Square.

^cFisher’s Exact.