Peeters 2001.

Methods	Study design: parallel RCT Study duration: not reported Duration of follow‐up: 2 years
Participants	Country: Belgium Setting: not reported Inclusion criteria: patients with 1st kidney transplant (cadaveric) Number: treatment group (35); control group (34) Mean age (years): treatment group (49.3); control group (50.5) Sex (M/F): treatment group (19/16); control group (17/17) Exclusion criteria:
Interventions	Treatment group Alfacalcidol: 1µg/d Control group Placebo Co‐interventions Calcium: 1000 mg
Outcomes	Death and graft survival Acute rejection episodes BMD Hypercalcaemia
Notes	Abstract‐only publication with no extractable data; no full‐text publication identified after 10 years Funding source: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information to permit judgement
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgement
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Selective reporting (reporting bias)	High risk	Data unable to be meta‐analysed
Other bias	Unclear risk	Insufficient information to permit judgement