Table 1.

Sociodemographic characteristics of the participant population, 1996–2010 Aotearoa/New Zealand birth cohort, by autism status.

	Participants, no. (%)
	Non-Autistic (n = 846,075)	Autistic (n = 11,919)
Sex
Female	415,647 (49.1)	2577 (21.6)
Male	430,428 (50.9)	9342 (78.4)
Māori ethnicity
Yes	262,707 (31.1)	2883 (24.2)
No	583,368 (68.9)	9306 (75.8)
Deprivation quintile
1 (least deprived)	152,577 (18.0)	2154 (18.1)
2	143,664 (17.0)	2229 (18.7)
3	143,415 (17.0)	2271 (19.1)
4	152,157 (18.0)	2349 (19.7)
5 (most deprived)	205,428 (24.3)	2403 (20.2)
Missing	48,834 (5.8)	513 (4.3)
Urban/rural
Urban	693,507 (82.0)	10,218 (85.7)
Rural	104,511 (12.4)	1200 (10.1)
Missing	48,057 (5.7)	501 (4.2)
Birth year
1996	55,443 (6.6)	516 (4.3)
1997	55,281 (6.5)	549 (4.6)
1998	54,435 (6.4)	567 (4.8)
1999	54,711 (6.5)	663 (5.6)
2000	55,617 (6.6)	687 (5.8)
2001	54,201 (6.4)	714 (6.0)
2002	53,208 (6.3)	792 (6.6)
2003	54,096 (6.4)	828 (6.9)
2004	55,128 (6.5)	804 (6.7)
2005	55,410 (6.5)	873 (7.3)
2006	56,877 (6.7)	957 (8.0)
2007	60,255 (7.1)	1017 (8.5)
2008	60,702 (7.2)	927 (7.8)
2009	60,333 (7.1)	981 (8.2)
2010	60,384 (7.1)	1044 (8.8)