. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: AIDS Behav. 2013 Nov;17(9):10.1007/s10461-013-0539-4. doi: 10.1007/s10461-013-0539-4

Table 4.

Summary of drug risk reduction outcome variables: means and standard errors

Variables	Intervention group					Control group					Significant effects
Variables	Pre-	Post-	3-month	6-month	12-month	Pre-	Post-	3-month	6-month	12-month	Significant effects
Demonstrated IV skills (0–100)	40.60^a (1.99)	76.37^e (2.03)	69.59^d (2.04)	74.12^e (1.97)	72.61^d,e (1.91)	42.75^a (2.09)	53.11^b (2.14)	60.34^c (2.15)	63.12^c (2.07)	63.63^c (2.01)	Group, Time, Group × Time, Time × Gender
Safer drug use (0–4)	3.25^a (0.10)	3.78^b (0.06)	3.83^b (0.05)	3.84^b (0.05)	3.87^b (0.05)	3.39^a (0.10)	3.79^b (0.06)	3.81^b (0.05)	3.77^b (0.06)	3.85^b (0.05)	Time
Knowledge (0–1)	0.96^a (0.02)	1.00^b (0.01)	1.00^b (0.01)	0.96^a (0.02)	0.98^a,b (0.02)	1.00^b (0.02)	0.98^a,b (0.01)	0.96^b (0.01)	0.99^a (0.02)	0.96^b (0.02)	Time × Group
Personal motivation (1–5)	4.79^a (0.05)	4.91^b (0.05)	4.76^a (0.07)	4.87^a,b (0.06)	4.88^a,b (0.04)	4.85^a,b (0.05)	4.83^a,b (0.05)	4.86^a,b (0.07)	4.78^a (0.06)	4.92^b (0.04)	Group × Gender
Self-efficacy (1–5)	4.01^a (0.10)	4.41^c (0.08)	4.42^c (0.08)	4.22^b (0.09)	4.38^b,c (0.08)	4.00^a (0.11)	4.38^b,c (0.09)	4.36^b,c (0.09)	4.45^c (0.10)	4.52^c (0.08)	Time, Gender
Social motivation (1–5)	4.65^a (0.08)	4.77^a,b (0.08)	4.90^b (0.04)	4.73^a (0.07)	4.63^a (0.09)	4.72^a (0.09)	4.69^a (0.08)	4.85^b (0.05)	4.91^b (0.07)	4.75^a,b (0.09)	Time

Different letters indicate post-hoc test differences at p <0.05