Table 2.

Characteristics of the Studies Meta-Analyzed

Variable	Mean	SD	Range
Age at baseline (years)	23.02	19.99	1.00–84.30
Interval (years)	5.43	2.91	.33–13.80
Age at follow-up (years)	28.45	20.53	1.67–86.30
Percent Female	54.12	9.46	.00–100
Percent Non-White	24.09	31.34	2.00–73.00

Note. Estimates weighted by sample size. Percent Non-White may be misleading as many studies did not report racial composition of the sample and were therefore coded as missing. However, given the populations sampled from (e.g., Minnesota, Northern Europe), it is likely that the large majority of the participants were White.