Field Epidemiological Investigation
A study on urinary iodine levels and influencing factors of urban and rural residents in some areas of Gansu Province
Gao Jie, Liu Jingfang, Tang Xulei, Fu Songbo, Ma Lihua, Jiao Caihong, Sun Weiming, Niu Ying, Jing Gaojing, Niu Qianglong, Zhao Nan, Li Yujuan, Wu Dan, Song Pei, Guo Huiping, Yang Fang, Teng Weiping, Shan Zhongyan
Published 2019-11-20
Cite as Chin J Endemiol, 2019,38(11): 898-902. DOI: 10.3760/cma.j.issn.2095-4255.2019.11.008
Abstract
ObjectiveTo analyze the urinary iodine status of urban and rural residents in some areas of Gansu Province and its related influencing factors, and to provide certain references for scientific iodine intake of urban and rural residents in Gansu Province.
MethodsSubjects in Gansu Province with normal thyroid function were recruited in the investigation of thyroid diseases and iodine nutritional status, conducted a questionnaire survey and measured height, weight, waist circumference, collected 1 urine sample, and tested their urinary iodine levels. The urinary iodine levels of different groups were compared based on different gender, region, age, body weight, the waist, and salt intaking. The affecting factors of urinary iodine levels were analyzed by multiple linear regression models.
ResultsTotally 1 964 subjects were recruited, including 1 099 males, and 865 females. The age was (41.23 ± 14.75) years old. The median urinary iodine of the selected group was 225.60 (158.80, 311.58) μg/L. The urinary iodine level of rural residents was significantly higher than that of urban residents [μg/L: 249.80 (180.58, 336.88) vs 206.25 (148.03, 280.33), Z=-8.015, P < 0.05], and there was no significant difference between the urinary iodine levels of male and female [μg/L: 222.40 (161.60, 298.90) vs 230.60 (158.00, 326.40), P > 0.05]. The composition ratio of < 100 μg/L group in rural areas was lower than that in urban areas (5.14% vs 8.27%, χ2= 7.45, P < 0.05), and the composition ratio of ≥300 μg/L group was higher than that in urban areas (34.93% vs 21.51%, χ2= 43.87, P < 0.05). The composition ratio of ≥300 μg/L group in male was lower than that in female (24.57% vs 31.21%, χ2= 10.73, P < 0.05). The multiple linear regression analysis showed that lived in rural areas, age, moderate and severe salt intaking, student, and weight were independently correlated with urinary iodine levels (β= 0.074, -0.001, 0.059, 0.034, 0.096, -0.003, P < 0.05). And the urinary iodine levels were decreased with age and weight increased (P < 0.05).
ConclusionsAt present, the iodine nutrition level of urban and rural residents in some areas of Gansu Province is generally over the adequate level. The urinary iodine level of rural residents is higher than that of urban residents. In the future, we should pay attention to the impact of different living areas, salt intaking and body weight on urinary iodine levels to prevent thyroid diseases.
Key words:
Urine; Iodine; Urban; Rural; Iodine status; Affecting factors
Contributor Information
Gao Jie
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Liu Jingfang
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Tang Xulei
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Fu Songbo
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Ma Lihua
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Jiao Caihong
the First People's Hospital of Longnan, Longnan 746000, China
Sun Weiming
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Niu Ying
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Jing Gaojing
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Niu Qianglong
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Zhao Nan
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Li Yujuan
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Wu Dan
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Song Pei
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Guo Huiping
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Yang Fang
Department of Endocrinology, the First Hospital of Lanzhou University, Lanzhou 730000, China
Teng Weiping
Department of Endocrinology, the First Affiliated Hospital of China Medical University, Shenyang 101100, China
Shan Zhongyan
Department of Endocrinology, the First Affiliated Hospital of China Medical University, Shenyang 101100, China
