The Third Nationwide Survey on Vitamin K Deficiency in Infancy in Japan
The Ministry of Health and Welfare of Japan has organized a research committee (chairmen: Kentaro Nakayama and Yoshiyuki Hanawa) on “Idiopathic Vitamin K Deficiency in Infancy since 1980.” The Ministry has funded nationwide surveys on vitamin K deficiency in infancy three times, i.e., in 1980, 1985, and 1988 [1–5]. Questionnaires were sent to the pediatric departments of 1011, 1218, and 1315 hospitals with 200 beds or more, respectively. Return rates were 42%, 40% and 59% respectively. On the surveys, we classified hemorrhage due to vitamin K deficiency as shown in Table 1 . A secondary type is those infants with an apparent cause for vitamin K deficiency such as congenital biliary atresia, neonatal hepatitis, and so on. Infants without these apparent reasons are categorized as idiopathic.
KeywordsBreast Milk Intracranial Hemorrhage Nationwide Survey Oral Vitamin Hemorrhagic Disease
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