[Investigation and analysis of salt sales and public consumption in supermarkets in Tianjin after salt reform].

Abstract

OBJECTIVE:

To investigate the consumption status of iodized and iodine-free salt and the attitude and reasons for Tianjin residents to choose salt after the reformation of the salt industry systems, and to provide a scientific basis for iodine supplementation and protect the public iodine adequate.

METHODS:

Stratified sampling method was used to investigate supermarkets of different sizes in 16 districts of Tianjin from December 2017 to May 2018. And 4-8 different sizes supermarkets were selected in the east, south, west, north, and middle directions of each district, and 25 consumers were selected in each district to conduct a questionnaire survey by Population Proportionate Sampling(PPS). Questionnaire survey was used by investigators to ask and record the respondents age, gender, salt type, time to eat a bag of salt, number of people dining, frequency of seafood consumption, special populations in the family(children, pregnant women or lactating women), reasons for choosing iodized salt or iodine-free salt. And the supermarket sales staff were questioned on the type and proportion of salt sold, the monthly sales of iodized salt and non-iodized salt, and the trend of sales volume.

RESULTS:

The sales volume of iodized salt was significantly greater than that of noniodized salt in the 94 different supermarkets(P<0. 05). Supermarkets with a rise in sales volume of non-iodized salt and iodized salt accounted for 40. 0% and 32. 9%, respectively. Significance difference was found in the prevalence of thyroid disease among people with different salt selection types(χ~2= 15. 052, P<0. 05). The prevalence of thyroid disease is higher in the non-iodized salt group. No significant difference was found in the prevalence of thyroid disease between different genders and age groups(χ~2= 0. 937, P > 0. 05; χ~2=2. 442, P > 0. 05). From the reasons why consumers choose different types of salt, the choice of iodized salt in the population, habits(45. 0%) accounted for a larger proportion, the prevention of thyroid disease accounted for 49. 6%. Among the people who chose to have no iodized salt, it is considered that Tianjin is a seaside city that does not need iodine supplementation, accounting for 55. 9%, and those who prevent thyroid disease account for 35. 6%. Prevention of thyroid disease account for 46. 9% and those who do not need iodine supplementation account for 40. 0% in a mixed population.

CONCLUSION:

There are blindness and misunderstanding when consumers select the type of salt.

• Authors: Hao Sun, Min Gao, Wenxing Guo, Qi Zhang, Yanbo Bai, Shu Gao, Wen Wu, Wanqi Zhang
• Journal: Wei sheng yan jiu = Journal of hygiene research (Wei Sheng Yan Jiu) Vol. 48 Issue 6 Pg. 932-937 (Nov 2019) ISSN: 1000-8020 [Print] China
• PMID: 31875818 (Publication Type: Journal Article)

Chemical References

• Sodium Chloride, Dietary
• Iodine

Topics

• Child
• Commerce
• Female
• Humans
• Iodine
• Lactation
• Male
• Pregnancy
• Pregnant Women
• Prevalence
• Sodium Chloride, Dietary
• Surveys and Questionnaires