Capability verification results of urinary iodine laboratories in Gansu Province from 2017 to 2021
10.3760/cma.j.cn231583-20230119-00013
- VernacularTitle:2017 - 2021年甘肃省尿碘实验室能力验证结果分析
- Author:
Wei SUN
1
;
Yugui DOU
;
Yanling WANG
;
Jing ZHENG
;
Xiaonan ZHU
;
Yongqin CAO
;
Runping ZHANG
Author Information
1. 甘肃省疾病预防控制中心地方病科，兰州 730020
- Keywords:
Urine;
Iodine;
External quality control
- From:
Chinese Journal of Endemiology
2024;43(6):498-501
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the testing capability of urinary iodine laboratories in Gansu Province and analyze the existing problems.Methods:Z-score method and uncertainty analysis were used to analyze the external quality control assessment results of urinary iodine laboratories in Gansu Province from 2017 to 2021 (data were collected from Gansu Center for Disease Prevention and Control).Results:From 2017 to 2021, the participation rate in the assessment of urinary iodine laboratories in the province was 100.0% (473/473), the feedback rate was 99.8% (472/473), and the pass rate was 91.9% (434/472). The pass rates for assessment from 2017 to 2021 were 82.7% (62/75), 93.9% (93/99), 94.9% (93/98), 92.0% (92/100), and 94.0% (94/100), respectively. The pass rates for provincial, municipal, and county assessments were 5/5, 98.6% (69/70), and 90.7% (360/397), respectively. The proportions of │Z│≤2, 2 <│Z│ < 3, and│Z│≥3 between laboratories in the province were 84.5% (399/472), 9.3% (44/472), and 6.2% (29/472), respectively. The proportions of│Z│≤2, 2 <│Z│ < 3, and│Z│≥3 within the laboratories were 88.6% (418/472), 9.1% (43/472), and 2.3% (11/472), respectively. There was a significant difference in the composition of │Z│ scores between laboratories annually (χ 2 = 24.60, P = 0.002), the proportion of│Z│≤2 increased from 66.7%(50/75) in 2017 to 90.0% (90/100) in 2021. The│Z│ scores between and within provincial laboratories were both ≤2. The proportion of │Z│≤2 between municipal and county-level laboratories was 91.4% (64/70) and 83.1% (330/397), respectively, the proportion of│Z│≤2 within laboratories was 92.9% (65/70) and 87.7% (348/397), respectively. There was no difference in the composition of│Z│ scores between and within provincial, municipal, and county-level laboratories( P < 0.05). The proportion of two concentration quality control blind sample results in the province that were both within the uncertainty range was 89.2% (421/472). From 2017 to 2021, they were 81.3% (61/75), 91.9% (91/99), 84.7% (83/98), 92.0% (92/100), and 94.0% (94/100), respectively, with statistically significant differences (χ 2 = 9.69, P = 0.021); provinces, cities, and counties were 5/5, 95.7% (67/70), and 87.9% (349/397), respectively, with statistically significant differences (χ 2 = 23.60, P = 0.023). Conclusions:Through continuous external quality control assessments of all established urinary iodine laboratories in Gansu Province, the overall testing capacity of urinary iodine laboratories at all levels has been continuously improved. However, in the future, it is still necessary to strengthen laboratory testing capabilities and improve the level of urine iodine detection.
