Methods	Randomised, double-blind, placebo-controlled, parallel-group, not obviously enriched. No imputation method mentioned Dose adjusted on clinic successive visits, “based on clinical symptoms”, to a maximum of 1200 mg daily (12 weeks total)
Participants	Painful diabetic neuropathy. N = 32, mean age 54 years, 53% female. Failed conventional treatment. PI ≥ 60/100 at randomisation
Interventions	Gabapentin 1200 mg daily (max), n = 17 Placebo, n = 15 All participants continued with non-opioid analgesia
Outcomes	≥ 50% pain reduction
Notes	Oxford Quality Score: R = 1, DB = 1, W = 0, Total = 2 Published as letter, some details confirmed by correspondence
Risk of bias
Item	Authors’ judgement	Description
Allocation concealment?	Unclear	Not reported
Blinding? All outcomes	Unclear	Not reported
Incomplete outcome data addressed? Efficacy	Unclear	Imputation not mentioned
Size Efficacy	No	32 randomised
Study duration Efficacy	Yes	12-week period
Outcomes reported	Yes	At least 50% reduction in pain