Randomization procedure
Centres with >180 eligible patients per week are offered the option to reduce their patient cohort by randomization. These centres are identified according to the number of eligible patients per week, as reported in the LAS VEGAS Site Survey.
Distribution:
< 180 procedures per week: no randomization
180 – 360 procedures per week: randomization to include 50% of their cohort
> 360 procedures per week: randomization to include 25% of their cohort
Only eligible, planned patients are suitable for randomization. All Emergency procedures and all procedures performed outside office hours (evening/ night/weekend) must be included and therefore should not enter the randomization program.
Details on randomization:
- Randomization program: ALEA (computerized)
- Stratified per centre
- 1 inlog provided per centre
- Random blocks
- Variables collected:
*Center name
*Date of surgery
*Urgency of procedure
*Surgical Procedure (same categories as collected in CRF)
*Planned duration of surgery (in hours)
*Age patient (in years)
*ASA score (1 to 5 or not available)
- Output: INCLUDE vs EXCLUDE
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