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Table 1 Sample Characteristics and Results of Risk Factors Associated With Completed Suicide Among People Treated for Drug Use Disorders Between 2000 and 2010 (n = 27,942)

From: Suicide among people treated for drug use disorders: a Danish national record-linkage study

  n/percentage (mean/standard deviation) Sub hazard ratio (95% confidence interval)
Year before drug use disorder treatment variables1
 Criminal charges within the past year 11,663 (41.7) 0.86 (0.62, 1.20)
 Self-harm within the past year 631 (2.3) 1.48 (0.70, 3.10)
 Psychiatric care within the past year 5298 (19.0) 1.96 (1.39, 2.77)
Clinical variables2
 Use of opioids 11,131 (39.8) 1.81 (1.23, 2.68)
 Use of central stimulants 8661 (31.0) 0.85 (0.58, 1.25)
 Use of cannabis 14,651 (52.4) 0.69 (0.50, 0.96)
 Use of Methyl​enedioxy​methamphetamine 2023 (7.2) 0.71 (0.34, 1.46)
 Alcohol use (problem drinking) 7182 (25.7) 1.56 (1.09, 2.23)
 Use of benzodiazepines 4458 (16.0) 1.18 (0.79, 1.76)
 Intravenous drug use 15,299 (54.8) 1.23 (0.86, 1.78)
Treatment status2
 Previously treated 9623 (34.5) Reference
 Never treated 15,212 (54.4) 1.14 (0.78, 1.67)
 Missing information 3107 (11.1) 1.44 (0.84, 2.45)
Socio-demographics1
 Female gender 6771 (24.2) 0.71 (0.47, 1.05)
 Age (mean/standard deviation) 27,942 (33.5/10.5) 0.97 (0.95, 0.98)
 Not in education, employment or training 19,276 (69.0) 1.13 (0.76, 1.70)
 Living without partner 20,204 (72.3) 1.10 (0.75, 1.63)
 Immigranta 2286 (8.2) 0.78 (0.41, 1.47)
  1. Note: a not born in Denmark
  2. 1Based on record linkage
  3. 2Based on the Registry of Drug Abusers in Treatment