Table A1.

Add Health descriptive statistics: sibling sample

Variable	Observed	Mean	SD		Min
Currently working (10+ h/week)	2,948	0.75	0.43	0	1
Earnings last year ($)	3,468	31,908.40	34,372.17	0	920,000
Social program participation	3,462	0.26	0.44	0	1
Diagnosed ADHD	3,468	0.05	0.21	0	1
Early diagnosis	3,464	0.02	0.15	0	1
Late diagnosis	3,464	0.02	0.15	0	1
Years of schooling	3,468	14.14	2.07	8	21
Ever married	3,467	0.50	0.50	0	1
Test score (wave 3)	3,468	99.97	14.59	9	123
Test score missing	3,468	0.16	0.37	0	1
Age (wave 4)	3,468	28.87	1.76	24.41667	33.58333
Female	3,468	0.53	0.50	0	1
Hispanic people	3,468	0.14	0.35	0	1
Black people	3,468	0.24	0.42	0	1
Maternal years of education	3,468	13.14	2.22	0	17
Family income as adolescent ($1,000 s)	3,468	45.24	41.13	0	800
Married parents	3,468	0.70	0.43	0	1
Test score (wave 1)	3,468	99.25	14.23	15	146
Rural status	3,468	0.27	0.44	0	1
Missing family information	3,468	0.28	0.45	0	1
Childhood mistreatment scale	3,468	0.02	0.61	−0.46231	4.035326
Ever diagnosed asthma	3,468	0.15	0.36	0	1
Low birth weight	3,468	0.19	0.37	0	1
Ever diagnosed with diabetes	3,468	0.03	0.16	0	1
Mistreatment missing	3,468	0.23	0.42	0	1
Low birth weight missing	3,468	0.17	0.38	0	1
Marijuana use (wave 1)	3,468	0.14	0.34	0	1
Obese (wave 1)	3,468	0.07	0.25	0	1
Depressed (wave 1)	3,468	0.09	0.28	0	1
Sexual initiation (wave 1)	3,468	0.37	0.48	0	1
Smoke (wave 1)	3,468	0.27	0.44	0	1
Drink (wave 1)	3,468	0.40	0.49	0	1