[Comparative epidemiological study on thyroid cancer in areas with different iodine intakes].
OBJECTIVE
To investigate the status of thyroid cancer among people aged 14 and over residing in areas with different iodine intakes.


METHODS
In-door interviews on prevalence of thyroid cancer were conducted among 22 976 persons aged 14 and over residing in three rural communities in Panshan County, Liaoning Province, an iodine deficient area, Zhangwu County, Liaoning Province, an iodine sufficient area, and Huanghua County, Hebei Province, an iodine excessive area. Morning fasting urine, drinking water and table salt were collected from part of the interviewees to be tested.


RESULTS
The medians of urinary iodide were 103.2 microgram/L, 374.8 microgram/L and 614.6 microgram/L among the interviewees in Panshan, Zhangwu and Huanghua respectively. No patient with thyroid cancer was found in Panshan and Zhangwu, while 10 interviewees in Huanghua were suffering from thyroid papillary carcinoma. During the period of 1994 - 2000, the prevalence of thyroid cancer was 91.58/100 000, and the incidence was 13.12/100 000 per year in Huanghua.


CONCLUSIONS
The prevalence and incidence of thyroid cancer in iodine excessive area are much higher than those in the other two areas.
Guan
H
H
Department of Endocrinology, The First Hospital Affiliated to China Medical University, Shenyang, 110001, China.
Teng
W
W
Yang
S
S
D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D007455:Iodine / Q000008:administration & dosage* / Q000652:urine; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013964:Thyroid Neoplasms / Q000453:epidemiology* / Q000378:metabolism
D007455:Iodine