| Methods |
|
| Participants |
|
| Interventions |
|
| Outcomes |
|
| Notes |
See Table 8
|
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Random sequence generation (selection bias) |
Low risk |
"Patients who met the study criteria were assigned to the control or experimental groups by using a table of random numbers" |
| Allocation concealment (selection bias) |
Unclear risk |
Not described. |
| Blinding (performance bias and detection bias)
Subjective outcomes |
High risk |
Patients aware of group allocation. |
| Blinding (performance bias and detection bias)
Objective outcomes |
Unclear risk |
Unclear if the anaesthetist was blinded. |
| Incomplete outcome data (attrition bias)
All outcomes |
Unclear risk |
Withdrawals, drop‐outs and missing data not described. |
| Selective reporting (reporting bias) |
Unclear risk |
Unknown if selective outcome reporting. |
| Protection from contamination? |
Low risk |
Interventions administered on an individual basis. |
