Reducing Salt Purchases with an Online Grocery Shopping Tool
Author Information
Author(s): Wu Jason HY, Maganja Damian, Huang Liping, Trieu Kathy, Taylor Fraser, Barrett Eden M., Arnott Clare, Feng Xiaoqi, Schutte Aletta E., Di Tanna Gian Luca, Mhurchu Cliona Ni, Cameron Adrian J., Huffman Mark D., Neal Bruce
Primary Institution: The George Institute for Global Health, University of New South Wales
Hypothesis
Does using a web browser extension to suggest lower sodium products reduce sodium purchases among individuals with hypertension?
Conclusion
The online grocery shopping intervention led to a significant reduction in sodium density of purchases among participants.
Supporting Evidence
- Participants using the SaltSwitch extension reduced sodium density by 204 mg/1000 kcal compared to controls.
- 86% of intervention participants made at least one switch to a lower sodium product.
- 98% of participants completed the trial.
Takeaway
This study shows that a tool can help people buy less salty food when they shop online, which is good for their health.
Methodology
Participants with hypertension were randomized to use the SaltSwitch extension or continue usual shopping for 12 weeks, measuring sodium density of purchases.
Potential Biases
Potential bias due to self-reported data and the nature of the intervention not allowing for masking.
Limitations
The study had a smaller sample size than initially planned, limiting the ability to detect effects on clinical outcomes like blood pressure.
Participant Demographics
Average age 56 years, 64% women, 89% White, 91% with BMI > 25 kg/m2, 83% on anti-hypertensive medication.
Statistical Information
P-Value
0.01
Confidence Interval
95%CI, -352 to -56
Statistical Significance
p=0.01
Digital Object Identifier (DOI)
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