Table 1.

Cohort characteristics.

	N	(%)1	Cases	(%)2	Person-years
Cohort	838,717	100.0	6,016	0.7	6,691,485
Sex
Male	423,788	50.5	3,584	0.9	3,264,893
Female	414,929	49.5	2,432	0.6	3,426,592
Decade of birth
1968–1977	352,489	42.0	3,493	1.0	3,764,578
1978–1987	338,754	40.4	2,135	0.6	2,347,931
1988–1997	147,474	17.6	388	0.3	578,976
Region of origin
Europe	355,404	42.4	2,031	0.6	2,738,818
Asia + Oceania	146,860	17.5	800	0.5	1,071,073
Middle East + North Africa	194,644	23.2	1,657	0.9	1,699,860
Sub-Saharan Africa	76,749	9.2	985	1.3	534,009
North America	24,628	2.9	155	0.6	177,430
South America	40,432	4.8	388	1.0	470,295
Family networks at migration
Migrating with family	247,303	29.5	2,295	0.9	2,646,642
Not migrating with family	591,414	70.5	3,721	0.6	4,044,844
Migrating to join family	80,497	9.6	853	1.1	827,961
Not migrating to join family	758,220	90.4	5,163	0.7	5,863,524
Migrating alone	552,681	65.9	3,407	0.6	3,723,702
Not migrating alone	286,036	34.1	2,609	0.9	2,967,783
Age-at-migration
Infancy	50,871	6.1	572	1.1	753,478
Early childhood	63,191	7.5	730	1.2	800,026
Middle childhood	89,117	10.6	903	1.0	1,044,651
Adolescence	119,475	14.2	1,196	1.0	1,194,370
Early adulthood	371,277	44.3	2,049	0.6	2,355,068
Adulthood	144,786	17.3	566	0.4	543,893
Dependent children at migration (n = 93,741)
Migrating with children	28,203	30.1	228	0.8	238,221
Not migrating with children	65,538	69.9	205	0.3	262,941

¹Column percent.

²Row percent.