A Before After Comparison of the Effectiveness of a Community-based Salt Reduction Program Done in Lithgow, Australia

Changing Population Salt Consumption in Lithgow, Australia


Lead sponsor: The George Institute

Collaborator: New South Wales Health
New South Wales Food Authority
Australian Food and Grocery Council
National Health and Medical Research Council, Australia

Source The George Institute
Brief Summary

The objective of this study is to determine whether a community-based salt reduction program can reduce average salt consumption levels. Baseline levels of salt consumption were measured in 2011, the salt reduction program was then implemented, and now in 2014 investigators are remeasuring salt consumption levels in the community. The hypothesis investigators are testing is that the salt reduction program will have led to a change in salt consumption levels between 2011 and 2014. The study is being done in Lithgow, a regional town in New South Wales , Australia.

Detailed Description

The primary objective of this project is to determine whether there have been changes in average salt consumption levels in the Lithgow population from 2011 to 2014. The primary null hypothesis to be tested is that there will be no difference between the mean 24-hour urinary sodium excretion levels between 2011 and 2014.

The sample of 419 individuals with 24-hour urine samples in the baseline survey and 600 individuals in the follow-up survey will provide 80% power to detect a difference of 0.7 g/day salt between the mean levels of excretion before and after the intervention. There will be more than 95% power to detect a difference of 1.0 g/day salt or greater.

Overall Status Completed
Start Date March 2011
Completion Date April 2014
Primary Completion Date April 2014
Phase N/A
Study Type Interventional
Primary Outcome
Measure Time Frame
Urinary sodium excretion (mmol/l) up to 4 years
Secondary Outcome
Measure Time Frame
Sources of sodium up to 4 years
Knowledge, attitudes and behaviors towards salt intake up to 4 years
Enrollment 991

Intervention type: Behavioral

Intervention name: Community-based salt reduction

Arm group label: Salt reduction



Inclusion Criteria:

- All adults over the age of 20 years residing in the Lithgow area are eligible

- No exclusion based on inter-current illness, use of medications or any other aspect of demography or personal history.

Gender: All

Minimum age: 20 Years

Maximum age: N/A

Healthy volunteers: Accepts Healthy Volunteers

facility The George Institute for Global Health
Location Countries


Verification Date

November 2014

Responsible Party

Responsible party type: Principal Investigator

Investigator affiliation: The George Institute

Investigator full name: Professor Bruce Neal

Investigator title: Professor

Has Expanded Access No
Condition Browse
Number Of Arms 1
Arm Group

Arm group label: Salt reduction

Arm group type: Experimental

Description: Community-based salt reduction

Study Design Info

Allocation: N/A

Intervention model: Single Group Assignment

Primary purpose: Treatment

Masking: None (Open Label)

Source: ClinicalTrials.gov