Table 1.

The characteristics of the two study groups, which consisted of patients with and without a migration background (number of patients [n] and percentage of sample, age±standard deviation [SD], parental socioeconomic status) for two periods of assessment

		Migrants			Non-migrants			Migrants vs. non-migrants p adj (χ2)
		Total	Males	Females	Total	Males	Females	Males	Females
ICD-9 assessment period								0.074 (3.191)α
	n	652	408	244	1,883	1,251	635
	%		62.6	37.4		66.4	33.6
Parental socioeconomic status								0.000 (74.9)	0.000 (103.6)
Low	%		27.0	38.5		10.0	9.4
Mid-low	%		64.7	54.9		76.7	77.3
Mid-high	%		5.9	4.9		9.0	8.7
High	%		2.5	1.6		4.2	4.1
Age±SD	Years							0.000 (41.7)	0.000 (42.5)
0–2	%		2.0	0.6		0.9	0.7
3–5	%		6.4	3.1		8.1	8.1
6–9	%		32.5	14.1		37.8	24.5
10–13	%		30.5	18.4		34.9	25.6
14–17	%		28.5	63.8		18.3	41.1
ICD-10 assessment period								0.002 (10.0)α
	n	702	412	290	2,748	1,789	959
	%		58.7	41.3		65.1	34.9
Parental socioeconomic status								0.000 (182.6)	0.000 (88.3)
Low	%		47.1	42.1		17.2	17
Mid-low	%		38.3	40		60.1	61.1
Mid-high	%		6.8	6.9		16.4	13.3
High	%		7.8	11		6.3	8.6
Age±SD	Years							0.000 (52.2)	0.005 (14.8)
0–2	%		1.9	0.0		0.7	0.3
3–5	%		9.5	4.8		7.0	5.6
6–9	%		23.4	14.0		35.6	21.5
10–13	%		27.2	19.3		33.8	25.5
14–17	%		38.0	61.8		22.9	47.0

The diagnosis was obtained in accordance with either the ICD-9 or ICD-10 criteria for an assessment period, with each period of assessment lasting 10 years.

^αThese values refer to the proportion of male and female patients in migrants vs. non-migrants.