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Table 4 Results of the multilevel Poisson model for injection drug use in the last 30 days

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

EffectbSEERR (95% CI)td.f.p
For intercept π0
 Intercept β002.070.187.92 (5.57, 11.28)11.22200< 0.001
 Gender β010.550.321.72 (0.91, 3.261.692000.09
For days slope π1
 Intercept β10− 0.0020.00040.997 (0.997, 0.998− 6.26744< 0.001
 Condition β110.0020.00051.002 (1.001, 1.003)3.42744< 0.001
 Gender β12− 0.00030.00051.00 (1.00, 1.00)− 0.567440.58
 Community treatment entry β13− 0.0010.00060.999 (0.998, 1.00)− 2.377440.02
 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