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Table 2 Follow-up status of cases and comparison of the current health status of cases and controls

From: The Edinburgh Addiction Cohort: recruitment and follow-up of a primary care based sample of injection drug users and non drug-injecting controls

Follow-up status of cases N = 794 (%) % Interviewed (N = 432)
Deceased 228 (28.7) 0.1a
Interviewed 432 (54.4) 100
Case notes available 654 (82.2) 100
Lost to follow-up 139 (17.5) -
Mean years follow-up 10.2 (SD 6.8, range < 1-25)
Current injector 135 31.3
Current OST 302 70.0
Opiate free1 75 17.4
Controls vs. cases health status % Controls (n = 432) % Cases (n = 432)
Smoker 255 (59.0) 403 (93.2)*
High risk alcohol use2 60 (13.9) 87 (20.1)#
Anxious3 87 (20.1) 209 (48.3)*
Depressed4 49 (11.3) 114 (26.4)*
Mean subjective QoL (SD)5 63.8 (22.7) 50.3( 23.6)^
  1. Notes: a: Five interviewees subsequently died before the end of the follow-up period. 1. Not in OST or injecting illicit opiates 2. Based on AUDIT score of ≥ 16 which indicates high risk or harmful drinking in the past year [48] 3. Based on a HADS anxiety subscale score ≥ 11 indicating caseness [49] 4. Based on a HADS depression subscale score ≥ 11 indicating caseness [49] 5. Mean EqVAS score, where a score of 0 is worst imaginable health state and of 100 is best imaginable health state[50]. Chi square test for difference: # p < 0.01, *p > 0.001, ^ t-test for equality of means: p < 0.001.
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