Table 3

Counts of ambulance and ED contacts, mean and SD stratified by postrelease opioid agonist treatment exposure (OAT; none: n=156, interrupted: n=34, retained: n=75), unadjusted (IRR) and adjusted incidence rate ratios (AIRR) and 95% CIs comparing use of emergency healthcare postrelease according to OAT use in the first 3 months postrelease among a cohort of men who regularly injected drugs prior to imprisonment (n=265)

OutcomeCount of contactsMean of contacts (SD)IRR (95% CI)P valueAIRR* (95% CI)P value
1. Ambulance contacts770.29 (0.80)
 OAT: none510.33 (0.80)1.001.00
 OAT: interrupted110.32 (0.88)0.97 (0.45 to 2.09)0.9430.54 (0.21 to 1.34)0.182
 OAT: retained150.20 (0.77)0.66 (0.35 to 1.27)0.2160.33 (0.14 to 0.76)0.009
2. ED contacts1270.46 (1.12)
 OAT: none810.52 (1.12)1.001.00
 OAT: interrupted140.41 (1.08)0.83 (0.42 to 1.67)0.6040.54 (0.23 to 1.24)0.144
 OAT: retained280.37 (1.15)0.77 (0.46 to 1.30)0.3350.43 (0.22 to 0.83)0.012
  • *Adjusted for age at baseline, Aboriginal and/or Torres Strait Islander, historical psychiatric admission, self-reported fair or poor health, times moved accommodation, count of general practitioner consultations, psychiatric well-being (GHQ-12 score) and any IDU since baseline interview.

  • GHQ-12, 12-item General Health Questionnaire; IDU, injecting drug use.