Tasker 1983.

Methods	RCT
Participants	Orthopaedic hospital in Leicester, England 100 patients with a proximal femoral fracture Mean age not stated. Male: % not stated Subcapital fractures Thompson's prosthesis Number lost to follow‐up: not stated
Interventions	Treatment group : Spinal Control group: General anaesthesia Exact method of anaesthesia not stated. The number of participants attributed to each treatment group is unspecified. For the purpose of this review, we counted them as 50 participants in each group
Outcomes	Mortality. This result was not included in the analysis: time point unknown
Notes	Conference abstract only Length of follow‐up: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"random selection", no details
Allocation concealment (selection bias)	Unclear risk	Not mentioned
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not mentioned
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not mentioned
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not mentioned, conference abstract
Selective reporting (reporting bias)	Unclear risk	Few details, conference abstract only
Other bias	Unclear risk	No details