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Table 3 Categorical by dichotomous interactions between receiving methadone and dummy variables of charge level with misdemeanor as the reference group (n = 788)

From: Technical violations and infractions are drivers of disengagement from methadone treatment among people with opioid use disorder discharged from Connecticut jails 2014–2018

 

TTR

Mann-Whitney/Kruskal-Wallis tests

+Resume

−Resume

Mean Diff.

     

Days (SD)

Days (SD)

Days

p-value

uHR

p-value

aHR

p-value

Resume methadone

      

0.6 (0.4, 0.7)

< 0.001

Misdemeanor - no felony

      

ref

Violation/infraction only

      

1.2 (0.9, 1.6)

0.184

Felony - no misdemeanor

      

1.2 (0.8, 1.9)

0.413

Felony and misdemeanor

      

1.1 (0.8, 1.5)

0.604

Resume*Charge level

   

< 0.001

    

Resume*Misdemeanor

402.3 (349.8)

224.8 (231.3)

-177.47

 

ref

ref.

Resume*Violation/Infr.

230.2 (340.2)

225.7 (397.5)

-4.5

 

1.5 (1.1, 2.2)

0.028

1.5 (1.0, 2.2)

0.038

Resume*Felony

399.8 (363.5)

198.6 (207.3)

-201.22

 

0.9 (0.5, 1.6)

0.685

0.9 (0.5, 1.6)

0.604

Resume*Misd/Felony

375.9 (324.6)

210.1 (206.7)

-165.88

 

1.0 (0.7, 1.4)

0.996

1.0 (0.7, 1.4)

0.951

Model 1

        

Community treatment status

        

Resume methadone

      

0.6 (0.4, 0.7)

< 0.001

Charges

        

Misdemeanor - no felony

      

ref

Violation/infraction only

      

1.2 (0.9, 1.6)

0.184

Felony - no misdemeanor

      

1.2 (0.8, 1.9)

0.413

Felony and misdemeanor

      

1.1 (0.8, 1.5)

0.604

Model 2: Interaction effects

        

Community treatment status*Charges

   

< 0.001

    

Resume*Misdemeanor

402.3 (349.8)

224.8 (231.3)

-177.47

 

ref

ref.

Resume*Violation/Infr.

230.2 (340.2)

225.7 (397.5)

-4.5

 

1.5 (1.1, 2.2)

0.028

1.5 (1.0, 2.2)

0.038

Resume*Felony

399.8 (363.5)

198.6 (207.3)

-201.22

 

0.9 (0.5, 1.6)

0.685

0.9 (0.5, 1.6)

0.604

Resume*Misd/Felony

375.9 (324.6)

210.1 (206.7)

-165.88

 

1.0 (0.7, 1.4)

0.996

1.0 (0.7, 1.4)

0.951

  1. uHR: unadjusted Hazard Ratio; aHR adjusted Hazard Ratio; SD: Standard Deviation; * p < 0.05; **p < 0.01; ***p < 0.001; ref: Referent category for categorical variable in regression; Models with interaction terms adjusted for age, race, and location