Sodium restricted Note change DBP: -3mmHg in standing BP diet (80mmol (SEM: 2.26, CI: and 24hr sodium/day and 1.43) ambulatory BP 60mmol not able to be potassium/day) calculated as Potassium insufficient supplemented data in paper diet (200mmol potassium/day) (not used in this analysis) Key features for bias assessment of randomised trials Citation Method of Allocation Blinding Loss to Use of Ceasing Reporting all Funding source randomisation concealment study outcome results where early for required benefit Richards et Unclear risk Unclear risk Participants: 25% (high risk) No (high risk) No (low Unclear risk National Heart al. (1984) (randomisation (method of high risk risk) (insufficient Foundation, method not concealment of information Medical Providers: stated) allocation not provided for Research high risk described) calculation of Council of New changes in Zealand (low Outcome standing and 24hr risk) assessors: ambulatory BP) unclear risk Summary table
Sodium restricted diet (80mmol sodium/day and 60mmol potassium/day) Potassium supplemented diet (200mmol potassium/day) (not used in this analysis) Note change in standing BP and 24hr ambulatory BP not able to be calculated as insufficient data in paper DBP: -3mmHg (SEM: 2.26, CI: 1.43) Key features for bias assessment of randomised trials Citation Method of randomisation Allocation concealment Blinding Loss to Use of where required Ceasing study early for benefit Reporting all outcome results Funding source Richards et al. (1984) Unclear risk (randomisation method not stated) Unclear risk (method of concealment of allocation not described) Participants: high risk Providers: high risk Outcome assessors: unclear risk 25% (high risk) No (high risk) No (low risk) Unclear risk (insufficient information provided for calculation of changes in standing and 24hr ambulatory BP) National Heart Foundation, Medical Research Council of New Zealand (low risk) Summary table