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Table 6 Results of the multilevel Poisson model for sharing injection paraphernalia in the last 30 days

From: Longitudinal analysis of HIV-risk behaviors of participants in a randomized trial of prison-initiated buprenorphine

Effect

b

SE

ERR (95% CI)

t

d.f.

p

For intercept π0

 Intercept β00

2.51

0.28

12.30 (7.11, 21.30)

9.05

94

< 0.001

 Gender β01

0.32

0.42

1.38 (0.60, 3.19)

0.77

94

0.45

For days slope π1

 Intercept β10

− 0.004

0.001

0.996 (0.993, 0.998)

− 3.4

118

< 0.001

 Condition β11

0.003

0.002

1.00 (1.00, 1.00)

1.92

118

0.06

 Gender β12

0.0003

0.002

1.00 (1.00, 1.00)

0.20

118

0.84

 Community treatment entry β13

− 0.007

0.004

0.99 (0.99, 1.00)

− 1.72

118

0.09

 Condition * community treatment entry β14

  1. N = 211. b denotes the unstandardized partial regression coefficient; SE denotes its standard error. ERR denotes the event rate ratio for a one unit increase in the given variable. t denotes the t statistic for the given parameter estimate and d.f. is its degrees of freedom. Participant gender; male = 0; female = 1. Treatment condition; buprenorphine initiated in the community = 0; buprenorphine initiated in prison = 1. Whether or not the participant entered community treatment within 10 days of release from prison; no = 0; yes = 1