. Author manuscript; available in PMC: 2010 Sep 23.

Published in final edited form as: Eval Rev. 1995 Apr 1;19(2):159–180. doi: 10.1177/0193841X9501900203

Table 2. Participation and Attrition by Cohort.

Measurement	1	2	3	4	5
Cohort 1	5th	5th	6th	7th	8th
Students	1,034	1,088	771	721	717
(%)	100	105	75	70	69
Parents	941	811	439	219	139
(%)	100	86	47	23	15
Cohort 2	7th	7th	8th	9th
Students	1,244	1,114	986	856
(%)	100	90	79	69
Parents	1,127	396	291	264
(%)	100	35	26	23