Table 1.

Descriptive Statistics for Attrition, Baseline Neuropsychological, and IIV Variables

Variable	Returnees (n = 219)	Attrition (Personal) (n = 37)	Attrition (Family) (n = 48)
Time to Attrition, years	5.55 (.20)	3.09 (1.27)	2.63 (1.24)
Block Design	36.84 (10.11)	27.84 (8.46)	31.63 (8.69)
Word Recall	16.97 (3.97)	13.35 (5.06)	15.81 (3.98)
Trails A, seconds	38.86 (12.92)	51.48 (20.51)	41.57 (12.28)
Trails B, seconds	86.77 (30.07)	120.03 (61.43)	95.23 (37.67)
Vocabulary	30.41 (4.28)	27.89 (4.82)	29.50 (4.48)
Basic ISD	7.41 (1.71)	9.22 (2.21)	7.82 (1.78)
Complex ISD	7.32 (2.53)	8.82 (2.44)	7.99 (2.63)

Note. M (SD); ISD = intraindividual standard deviation.