Table 1

Example of Subject Stratification for SSS, Rows Indicate the Treatment Arms, Columns Indicate Strata and Cell Values Indicate the Number of Participant

Strata
Treatment
 1
 2
 4
 5
 8
Placebo
 10
 7
 15
 14
 38
Drug
 12
 10
 5
 14
 40
Total
 22
 17
 20
 28
 78

Hedden et al. Substance Abuse Treatment, Prevention, and Policy 2008 3:13   doi:10.1186/1747-597X-3-13

Open Data