Table 3: Odds Ratios for High School Graduation of Youngest Sibling, by older siblings' sex and graduation status, for the whole population, and males and females separately.

^aAdjusted for all variables in Table 1

	All (n = 5,771)	Male (n = 2,986)	Female (n = 2,785)
	Adjusted a Odds Ratio	Adjusted Odds Ratio	Adjusted Odds Ratio
Older Sibling Graduation Status and Sex	(95% CI)	(95% CI)
Oldest Sibling Graduated vs Oldest Sibling did not Graduate
Oldest Sibling is Male	1.71 (1.22, 2.40)	1.97 (1.26, 3.08)	1.45 (0.84, 2.50)
Oldest sibling is Female	2.20 (1.50, 3.22)	1.57 (0.95, 2.59)	3.84 (2.07, 7.12)
Middle Sibling Graduated vs Middle Sibling did not Graduate
Middle Sibling is Male	2.73 (1.97, 3.79)	2.87 (1.93, 4.59)	2.73 (1.61, 4.62)
Middle sibling is Female	3.27 (2.24, 4.78)	3.30 (1.98, 5.09)	3.62 (1.99, 6.55)
C-Statistic	0.911	0.901	0.924