Dash 2019.

Study characteristics
Methods	Study design: RCT (abstract) Setting: India
Participants	State of disease/disease type: unknown UC Inclusion criteria: newly diagnosed UC Exclusion criteria: not stated Age: mean: 39.68 (SD 10.07) years Sex: not stated Number randomised: 76 (Group 1); 76 (Group 2) Number analysed: not stated
Interventions	Group 1: low‐dose vitamin D (dose not specified) Group 2: no intervention
Outcomes	Duration of follow‐up: not stated Outcomes UCDAI SIBDQ
Notes	Funding source: not stated Conflicts of interest: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Reported as randomised, although method of randomisation was not reported.
Allocation concealment (selection bias)	Unclear risk	No information to assess allocation concealment.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Blinding was not reported.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Blinding was not reported.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No information to assess attrition.
Selective reporting (reporting bias)	Unclear risk	Not yet published although abstract was presented in 2019.
Other bias	Low risk	No evidence that other significant sources of bias exist.