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Table 2 Characteristics of patients at the time of admission into treatment for DUDs, by prescription and dose category of benzodiazepines

From: Benzodiazepine prescription for patients in treatment for drug use disorders: a nationwide cohort study in Denmark, 2000–2010

  No prescription of benzodiazepines 1 year after admission Prescription of benzodiazepines 1 year after admission in moderate-high doses <584 DDDa Prescription of benzodiazepines 1 year after admission in very high doses ≥584 DDDa p value
  N (%) N (%) N (%)  
Number of individuals 24498   6528   2177   
Age in years at admission date, mean (SD)   29.2 ± 9.7   35.3 ± 10.7   41.0 ± 9.5 <0.001
Gender        <0.001
 Male 18884 77.1 4630 70.9 1512 69.5  
 Female 5614 22.9 1898 29.1 665 30.5  
Primary drug use at admission        <0.001
 Cannabis 9212 37.6 1193 18.3 84 3.9  
 Opioids 5011 20.4 2639 40.4 1166 53.6  
  Methadone or buprenorphine 1236 5.0 955 14.6 594 27.3  
  Heroin 3454 14.1 1458 22.3 463 21.3  
  Other opioids 321 1.3 226 3.5 109 5.0  
 Benzodiazepines 213 0.9 207 3.2 83 3.8  
 Central stimulating drugsb 3648 14.9 534 8.2 50 2.3  
 Other illicit drugs/unknown 6414 26.2 1955 29.9 794 36.5  
Psychiatric treatment received in 1 year prior to admissionc 4148 16.9 1782 27.3 430 19.8 <0.001
Prescription of benzodiazepines 1 year prior to admission 2464 10.1 4113 63.0 2026 93.1 <0.001
  1. Abbreviations: DUDs, drug use disorders; DDD, Defined Daily Dose
  2. aIntake of 1 DDD daily of benzodiazepines in a 1 year period results in a total intake of 365 DDD
  3. bAmphetamine, cocaine, and MDMA
  4. cInformation obtained from the Danish Psychiatric Central Research Register