Korean J Fam Med.
2012 Mar;33(2):94-104. 10.4082/kjfm.2012.33.2.94.
Lack of Association between Self-reported Saltiness of Eating and Actual Salt Intake
- Affiliations
-
- 1Department of Family Medicine, Seoul National University College of Medicine, Seoul, Korea. msp20476@hanmail.net
- 2Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea.
- 3Department of Family Medicine, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea.
- KMID: 2304275
- DOI: http://doi.org/10.4082/kjfm.2012.33.2.94
Abstract
- BACKGROUND
Reducing salt intake is known to be an important factor for lowering blood pressure and preventing cardiovascular disease. Estimating amount of salt intake is a necessary step towards salt intake reduction. Self-reported saltiness of diet is a method most easily used to measure a patient's salt intake. The purpose of this study was to examine the value of self-reported saltiness of diet in measuring salt intake.
METHODS
We used data from 681 participants who visited a health center at a university hospital between August 2003 and November 2005. A self-administered questionnaire was used to collect information on self-reported saltiness of diet, other dietary habits and lifestyle factors. Salt intake was estimated on the basis of 24-hour dietary recall with a computer-aided nutritional analysis program (CAN-Pro 2.0, Korean Nutrition Society).
RESULTS
There was no statistically significant difference between the mean salt intake of the self-reported salty diet group (13.7 +/- 4.8 g/d) and the self-reported unsalty diet group (13.3 +/- 4.4 g/d). If we assume calculated salt intake as the gold standard, the sensitivity and specificity of self-reported saltiness were 39.5% and 63.6%, respectively. Salt intake was increased with higher calorie intake, frequency of eating breakfast (> or =5 times/wk) and being satiated with usual diet in men, but it was increased only with higher calorie intake in women. Regardless of actual salt intake, the group satiated with a usual diet tended to be in the group of self-reported salty diet.
CONCLUSION
Self-reported saltiness of diet was not associated with actual salt intake. Further studies will be needed on the simpler and more objective tools to estimate salt intake.
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