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. Author manuscript; available in PMC: 2018 May 2.
Published in final edited form as: J Subst Abuse Treat. 2016 Dec 30;74:71–79. doi: 10.1016/j.jsat.2016.12.009

Table 4.

Median outcome values, participants with DSM-IV drug dependence at baseline (n = 39).

Baseline 60-day p-valuea 6-month p-valuea 12-month p-valuea
NumDU (frequency)
 Control (n = 14) 7.5 3.0 0.24 6.0 0.02 4.0 0.12
 MI-only (n = 12) 12.0 0.0 0.0 3.0
 MI+HealthCall (n = 13) 9.0 5.0 2.0 1.0
QuantU (quantity)
 Control (n = 14) 10.7 3.3 0.77 7.8 0.04 4.3 0.11
 MI-only (n = 12) 17.1 0.0 0.0 2.0
 MI+HealthCall (n = 13) 18.2 8.5 5.3 0.8
a

p-Value from Kruskal-Wallis test of whether there are treatment group differences in reduction of drug use between baseline and 60-day, 6-month, or 12-month follow-up.