Analysis of the review results of salt iodine monitoring in county-level iodine deficiency disorders laboratories in Jinzhong City form 2021 to 2023
10.3760/cma.j.cn231583-20231218-00137
- VernacularTitle:2021 - 2023年晋中市县级碘缺乏病实验室盐碘监测复核结果分析
- Author:
Fang YANG
1
;
Jingzhen LIU
;
Junli CHENG
;
Yanling REN
Author Information
1. 晋中市疾病预防控制中心卫生疾病检验部，晋中 030600
- Keywords:
Iodine;
Salts;
Review;
Quality;
Comparative analysis
- From:
Chinese Journal of Endemiology
2024;43(11):928-932
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the review results of salt iodine monitoring in the county-level laboratories of iodine deficiency disorders in Jinzhong City, and to learn about the quality of the monitoring in the county-level laboratories, so as to provide scientific basis for formulating iodine deficiency disorders prevention and control strategies.Methods:From 2021 to 2023, Jinzhong Center for Disease Control and Prevention used the systematic random sampling method to select 5% (15 samples each) of all edible salt samples (short for salt samples) tested by 11 county-level iodine deficiency disorders laboratories under its jurisdiction for retesting each year. The salt iodine was determined by the redox titration method in accordance with the "General Test Method in Salt Industry-Determination of Iodine" (GB/T 13025.7-2012). Comparisons between groups for count data were analyzed using the χ 2 test, and the comparisons between groups for measurement data were analyzed using a random group design t-test. Results:From 2021 to 2023, the municipal laboratories reviewed and tested 165 salt samples (495 in total over 3 years). The proportion of households using adquately iodized salt tested by county-level laboratories was 92.53% (458/495), with annual rates of 89.70% (148/165), 93.33% (154/165), and 94.55% (156/165), respectively. The proportion of households using adquately iodized salt detected by municipal laboratories was 94.95% (470/495), with annual rates of 90.91% (150/165), 96.36% (159/165), and 97.58% (161/165), respectively. There was no significant difference in the proportion of households using adquately iodized salt detected by the two-level laboratories from 2021 to 2023 (χ 2 = 2.48, P = 0.116). The proportion of salt samples with relative error > 20% in the salt iodine detection results of county-level laboratories reviewed at the municipal laboratory from 2021 to 2023 were 20.00% (33/165), 16.97% (28/165), and 8.48% (14/165), respectively. The differences between different years were statistically significant (χ 2 = 8.49, P = 0.004). Compared with 2023, in 2021 and 2022, the differences were statistically significant ( P < 0.05). The proportion of salt samples with relative error > 30% were 7.88% (13/165), 6.06% (10/165), and 3.64% (6/165), respectively. There was no significant difference among different years (χ 2 = 2.69, P = 0.101). The comparison of laboratory test results between the two-level laboratories showed statistically significant differences ( t = 6.05, P < 0.001). Among the group data reviewed, there were a total of 16 groups with statistical significance, including 4 groups in 2021, 7 groups in 2022, and 5 groups in 2023. Conclusions:The review results indicate that the quality of salt iodine monitoring in county-level laboratories in Jinzhong City continues to improve, and the testing data are authentic and reliable. In the future, training for county-level laboratory inspectors should be increased to enhance their operational skills and minimize testing result errors.
