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Table 1 Changes in DAT outcomes

From: Drug use and treatment success among gang and non-gang members in El Salvador: a prospective cohort study

  Past month any illegal substance use Frequency of past month binge drinking Past month crime Past 6 mo. gang risk activity
  t OR t r t OR t r
Intercept 1.32 2.05 7.83** .88 1.51 2.17 8.59** .90
Inv. Mills −2.23* .39 −1.76+ -.07 −2.59* .35 −2.52* -.10
Time −10.26** .15 −15.72** -.43 −9.84** .17 −15.16** -.42
  χ2 ICC χ2 ICC χ2 ICC χ2 ICC
Repeated Observation Variance 675.22* .16 718.18** .08 632.54 .08 1543.42** .47
Center Variance 53.44** .08 47.04** .03 45.79** .05 19.86 .00
  1. ** p < .01, * p < .05, + p < .10; N = 625; t-tests are based on 18 df for the intercept, 623 df for the inverse Mill’s ratio, and 1070 df for time; effect size r calculated using the formula reported in Cohen [26]: r = [ t2 / ( t2 + df ) ].5.