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. 2009 Oct 7;2009(4):CD002192. doi: 10.1002/14651858.CD002192.pub2

De Witte 2002.

Methods Anaesthetic drugs used: propofol, sufentanil 0.2mcg.kg, mivacurium, O2, 66% N2O, desflurane >1.2 MAC. 
 Premed‐Induction interval 60‐90 mins
Participants 45
Interventions Drug(s) and dose: alprazolam 0.5mg vs. midazolam 7.5mg vs. placebo
Outcomes Discharge time from PACU, Discharge time from clinic, DSST and TDT
Notes 1) Patient assessed preop anxiety reduced with both midazolam and alprazolam. Sedation was greater with alprazolam 
 2) Difference from placebo? No difference in discharge time from PACU. TDT and DSST affected by midazolam and alprazolam at time of discharge from PACU but returned to baseline by time of discharge from clinic
Risk of bias
Bias Authors' judgement Support for judgement
Adequate sequence generation? Unclear risk Method of randomization unknown
Allocation concealment? Unclear risk B ‐ Unclear