Tucker 1989.

Study characteristics
Methods	Study design Parallel RCT Duration of study Not reported Duration of follow‐up 18 weeks
Participants	General information Setting: single centre Country: USA Inclusion criteria: average inter‐dialysis fluid weight gain in last 3 months ≥ 4 pounds Exclusion criteria: not reported Baseline characteristics Number: intervention group 1 (26); intervention group 2 (26); intervention group 3 (26); control group (25) Mean age ± SD: 53.4 ± 14.7 years Sex (M/F): 44/59 Stage of CKD: ESKD on HD
Interventions	Intervention type Self‐management individual versus control Intervention group 1 Self‐monitoring, nurse praise, monetary rewards and self‐reinforcement Intervention group 2 Self‐monitoring, nurse praise, monetary rewards and self‐reinforcement Behavioural control technique Intervention group 3 Self‐monitoring, nurse praise, monetary rewards and self‐reinforcement Behavioural control technique Family support Control group Usual care
Outcomes	Potassium Daily fluid gain Social support scale Compliance
Notes	Conflict of interest Not reported Funding source "Supported by grant DK35280‐02 from the National Institutes of Health" Other information Not requested
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomised block procedure
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgement
Blinding of participants and personnel (performance bias) All outcomes	High risk	Participants were not blinded. No mention of whether staff blinded Nursing staff giving intervention could not have been blinded
Blinding of outcome assessment (detection bias) Subjective outcomes	High risk	Self reported fluid intake
Blinding of outcome assessment (detection bias) Objective outcomes	Low risk	Medical record data for IDWG
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No mention of loss to follow‐up
Selective reporting (reporting bias)	Unclear risk	Insufficient information to permit judgement
Other bias	Unclear risk	Monetary gifts, short follow‐up period