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. Author manuscript; available in PMC: 2021 Nov 8.
Published in final edited form as: J Subst Abuse Treat. 2018 Jul 31;94:81–90. doi: 10.1016/j.jsat.2018.07.014

Table 4.

Imputation results.

Treatment Arm Approach to
imputing
missing 12-
month
follow-up
data		 Days
using
heroin at
12-
month
follow-
up		 Percentage of
patients with a
positive opioid
urine screen at
12-month
follow-up		 Percentage of
patients meeting
DSM-IV criteria
for opioid
dependence at
12-month
follow-up
Mean
(SE)		 Mean
(SE)		 Mean
(SE)
TAU Drop missing 5.3 (0.8) 49% (4.7) 63% (4.4)
Multiple imputation 5.3 (0.7) 49% (1.3) 64% (1.2)
Assume baseline valuesa 9.8 (1.0) 60% (4.0) 69% (3.8)
PCM Drop missing 6.5 (0.9) 54% (4.5) 54% (4.5)
Multiple imputation 6.6 (0.8) 53% (1.3) 55% (1.3)
Assume baseline valuesa 9.4 (1.0) 61% (4.1) 60% (4.1)

Standard errors (SE) of the mean are presented in parenthesis.

a

Opioid urine screen at 12-month follow-up missing values were replaced with positive results.