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. 2019 May 2;16:31. doi: 10.1186/s12954-019-0301-y

Table 3.

Non-prescribed use of methadone, buprenorphine, and buprenorphine/naloxone in the study population

Non-prescribed use of methadone Non-prescribed use of buprenorphine Non-prescribed use of buprenorphine/naloxone
Total
 Whole population (411) 87.8% 80.5% 50.6%
Gender
 Woman (104) 85.6% 75.0% 54.1%
 Man (307) 88.6% 82.4% 43.0%
 Chi-2 (P value) 0.415 0.099 0.054
Country of birth
 Sweden (333) 88.9% 82.6% 53.5%
 Other country (78) 83.3% 71.8% 42.1%
 Chi-2 (P value) 0.177 0.030 0.073
Education
 Comprehensive school (195) 86.7% 82.6% 52.9%
 High school or more (216) 88.9% 78.7% 50.0%
 Chi-2 (P value) 0.491 0.324 0.563
Drug
 Methadone (219) 92.7% 74.0% 45.1%
 Buprenorphine (112) 81.3% 87.5% 49.5%
 Buprenorphine/naloxone (80) 83.8% 88.8% 70.9%
 Chi-2 (P value) 0.005 0.002 0.000
Treatment period, length of
 Up to 1 year (138) 90.6% 88.4% 65.9%
 1–3 years (140) 90.7% 85.7% 58.6%
 More than 3 years (130) 82.3% 66.2% 25.8%
 Chi-2 (P value) 0.054 0.000 0.000
Experience of involuntary discharge
 No (262) 85.9% 80.2% 52.3%
 Yes (149) 91.3% 81.2% 49.7%
 Chi-2 (P value) 0.108 0.795 0.606
City
 Malmö (196) 92.9% 75.5% 51.5%
 Göteborg (118) 81.4% 88.1% 49.1%
 Lund (54) 88.9% 77.8% 46.3%
 Jönköping/Norrköping (43) 81.4% 86.0% 63.4%
 Chi-2 (P value) 0.012 0.035 0.366
Interviewers
 Researchers (280) 88.2% 78.6% 49.1%
 Privileged access interviewers (131) 87.0% 84.7% 56.2%
 Chi-2 (P value) 0.731 0.142 0.184