Table 2

Multivariable logistic regression analyses* for point prevalence abstinence, 6-month continuous abstinence, and sustained abstinence
Point prevalence abstinence
Variable OR 95% CI for OR p-value
Program; HIT vs. LIT (ref) 1.21 0.59-2.49 .599
Gender; men vs. women (ref) 0.54 0.20-1.46 .226
Point prevalence at 12-month follow-up; yes vs. no (ref) 13.82 6.44–29.65 <.001
Other support at 12-month follow-up; yes vs. no (ref) 4.37 1.13–16.95 .033
§ Program; HIT vs. LIT (ref) 1.12 0.56-2.26 .751
§ Gender; men vs. women (ref) 0.67 0.26-1.71 .405
§ 6-month continuous abstinence at 12-month follow-up; yes vs. no (ref) 13.53 5.66–32.32 <.001
§ Other support at 12-month follow-up; yes vs. no (ref) 4.95 1.30–18.85 .019
6-month continuous abstinence
Variable OR 95% CI for OR p-value
Program; HIT vs. LIT (ref) 1.26 0.65-2.43 .487
Gender; men vs. women (ref) 0.55 0.23-1.35 .193
Point prevalence at 12-month follow-up; yes vs. no (ref) 14.10 7.05–28.19 <.001
Program; HIT vs. LIT (ref) 1.10 0.57-2.13 .779
Gender; men vs. women (ref) 0.62 0.26-1.51 .297
6-month continuous abstinence at 12-month follow-up; yes vs. no (ref) 18.70 8.30–42.16 <.001
Sustained abstinence **
Variable OR 95% CI for OR p-value
Program; HIT vs. LIT (ref) 3.44 1.34–8.83 .010
Gender; men vs. women (ref) 1.21 0.41-3.60 .733

* Performed with variables significant at p<0.02 in the univariable analyses, only including variables up to 12-month follow-up.

Separate models for point prevalence at 12-month follow-up and for 6-month continuous abstinence at 12-month follow-up.

N=210, Nagelkerke R-Square 39.2%, Hosmer and Lemeshow test of goodness of fit p=0.884.

§ N=210, Nagelkerke R-Square 33.5%, Hosmer and Lemeshow test of goodness of fit p=0.920.

N=284, Nagelkerke R-Square 31.7%, Hosmer and Lemeshow test of goodness of fit p=0.969.

N=284, Nagelkerke R-Square 30.7%, Hosmer and Lemeshow test of goodness of fit p=0.932.

** N=210, Nagelkerke R-Square 11.7%, Hosmer and Lemeshow test of goodness of fit p=0.970.

Nohlert et al.

Nohlert et al. BMC Public Health 2013 13:592   doi:10.1186/1471-2458-13-592

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