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Table 5 Results of the multilevel Poisson model for using unsterilized needles 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

1.15

0.38

3.16 (1.50, 6.65)

3.02

94

0.003

 Gender β01

0.55

0.56

1.74 (0.57, 5.27)

0.99

94

0.33

For days slope π1

 Intercept β10

− 0.002

0.002

1.00 (1.00, 1.00)

− 1.20

120

0.23

 Condition β11

− 0.0003

0.002

1.00 (1.00, 1.00)

− 0.15

120

0.88

 Gender β12

− 0.0002

0.002

1.00 (1.00, 1.00)

− 0.11

120

0.91

 Community treatment entry β13

− 0.01

0.006

1.00 (0.98, 1.00)

− 1.58

120

0.12

 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