Journal of Epidemiology
Online ISSN : 1349-9092
Print ISSN : 0917-5040
ISSN-L : 0917-5040
Response Bias in the Nationwide Epidemiological Survey of an Intractable Disease in Japan
Shuji HashimotoKazuo FukutomiMasaki NagaiYosikazu NakamuraHiroshi YanagawaRyuichiro SasakiYoshiyuki OhnoKunio Aoki
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1991 Volume 1 Issue 1 Pages 27-30

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Abstract

Annual numbers of patiens with the so-called intractable diseases were estimated in the nationwide epidemiological surveys under the assumption that the mean number of patients among “responded” hospitals is equal to that among “non-responded” hospitals. This paper evaluated the validity of this assumption, using the data of idiopathic thrombopenic purpura (ITP) obtained from the nationwide epidemiological survey and the number of ITP patients who are financially subsidized for treatment (FST-patients). The mean numbers of ITP FST-patients among “responded” hospitals in the nationwide survey were compared with the mean numbers among “non-responded” hospitals. The ratio of the mean number among “responded” hospitals to that among all hospitals was found to be between 1.0 and 1.1 ; suggesting that this assumption was sufficiently valid. J Epidemiol, 1991 ; 1 : 27-30.

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