Said 2010.

Methods	Parallel‐group, randomised controlled trial This study was carried out in a secondary care setting in a single dermatology department in Singapore
Participants	47 participants with chronic vesicular hand eczema Dropouts: 7 Inclusion criteria of the trial Chronic vesicular hand eczema Exclusion criteria of the trial Not defined Study population Gender: not stated Age: not stated
Interventions	Interventions • UVA‐1 phototherapy 3 times a week for 6 weeks in 24 participants • Betamethasone‐valerate 0.1% cream twice a day for 6 weeks in 23 participants Duration 6 weeks active treatment, 6 weeks follow‐up. Total duration: 12 weeks
Outcomes	Primary outcomes of the trial Not defined Other outcomes Degree of improvement based on the Dyshidrotic Area and Severity Index (DASI) at week 3, week 6, and week 12 Adverse events
Notes	Conference abstract, from which only limited information can be extracted We were unable to contact the study authors Declarations of interest: not stated Funding: not stated Sample size rationale: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "twenty‐four patients were randomly assigned to..." Comment: insufficient data
Allocation concealment (selection bias)	Unclear risk	Insufficient data
Blinding of participants and personnel (performance bias) All outcomes	High risk	Quote: "open‐label study" Comment: no blinding
Blinding of outcome assessment (detection bias) All outcomes	High risk	Quote: "open‐label study" Comment: no blinding
Incomplete outcome data (attrition bias) All outcomes	Low risk	More than 80% of participants were analysed (40/47)
Selective reporting (reporting bias)	Unclear risk	No trial register was found
Other bias	Unclear risk	Baseline comparisons: no baseline comparisons regarding group differences (randomisation check) Diagnostic certainty: no The study was completed