Table 2.

12-month cross-border mobility - number and usual duration of visits and main reason of crossing, for total sample and by age groups

	Total sample					Age 18–29					Age 30–65

# of visits last year	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²
Not in past 12m	971	60.1	19.4	18.0	10.3	337	66.9	20.4	24.5	12.9	634	57.3	18.9	14.9	9.0
1–2 times	142	8.2	15.1	18.7	7.1	43	8.4	20.4	32.5	11.3	99	8.1	12.8	12.8	5.4
≥3 times	441	31.8	20.8	15.5	11.6	124	24.7	25.8	33.2	21.1	317	34.6	19.4	10.3	8.8

Usual length of visits	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²

Not in past 12m	971	59.8	19.4	18.0	10.3	337	66.8	20.4	24.5	12.9	634	56.9	18.9	14.9	9.0
One full day or less	451	30.4	17.9	14.2	8.9	127	25.3	24.6	28.3	19.1	324	32.4	15.7	9.8	5.7
> one full day	142	9.9	24.7	22.3	16.2	42	8.0	23.0	47.2	16.6	100	10.6	25.2	14.7	16.1

Main reason for border crossing	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²	n	%	% HD¹	% DSM-5	% Co-use²

Not in past 12m	971	59.8	19.4	18.0	10.3	337	66.8	20.4	24.5	12.9	634	56.9	18.9	14.9	9.0
Shopping	64	3.8	19.7	18.8	13.7	17	3.2	26.9	13.6	13.6	47	4.1	17.5	20.4	13.8
Healthcare/medical care	108	8.0	11.3	12.9	6.0	21	4.8	12.0	28.1	6.3	87	9.3	11.1	9.8	6.0
Over counter or Prescrip. Drugs	42	2.8	38.8	26.5	32.4	11	1.9	64.0	77.6	64.0	31	3.1	32.4	13.6	24.5
Nightlife i.e. drinking	17	1.0	42.9	65.6	28.3	9	1.8	54.5	78.8	54.5	8	0.7	30.3	51.3	0
Visit family or friends	317	21.9	19.9	13.7	8.7	101	19.8	20.0	29.2	15.4	216	22.7	19.8	8.2	6.4
Work/Study/Others	45	2.7	12.4	13.9	7.1	10	1.7	25.1	24.3	7.7	35	3.1	9.5	11.5	7.0

Heavy drinking is at least 5+ for men and 4+ for women monthly during last 12 months

Co-use is defined as both heavy drinking (see ¹ above) and any drug use (illicit drug or non-medically prescription drug use) last 12 month