Abstract
The finding that influenza epidemics are associated with an increased risk of adult schizophrenia has been controversial. Data was obtained from Japan's governmental statistics, the Patient Survey. Index years were defined as 1957/1958, 1962, and 1965, and comparison years were defined 2 years before and 2 years after the index year. Subjects were patients with schizophrenia who were born in the index years of influenza epidemics. Periods 5 months after the influenza epidemics were defined as exposed months. Proportions of patients born during the exposed period in the index years were compared with those of patients born in the corresponding months in the comparison years. The proportions of patients born in the exposed months in the index years were not significantly different from those born in the corresponding months in the comparison years, with odds ratios around 1 in the whole country, the Kanto area, and the Shikoku/Kyushu area where a remarkable influenza epidemic was observed in 1957. No difference was observed in analyses stratified by sex. In Japan, there was no relationship between influenza epidemics and schizophrenic birth. Copyright (C) 2000 Elsevier Science Ltd.
| Original language | English |
|---|---|
| Pages (from-to) | 133-138 |
| Number of pages | 6 |
| Journal | Journal of Psychiatric Research |
| Volume | 34 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Mar 1 2000 |
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Keywords
- Birth
- Epidemic
- Influenza
- Japan
- Schizophrenia
ASJC Scopus subject areas
- Psychiatry and Mental health
- Biological Psychiatry
- Psychology(all)
Cite this
No relationship between schizophrenic birth and influenza epidemics in Japan. / Mino, Yoshio; Oshima, Iwao; Tsuda, Toshihide; Okagami, Kazuo.
In: Journal of Psychiatric Research, Vol. 34, No. 2, 01.03.2000, p. 133-138.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - No relationship between schizophrenic birth and influenza epidemics in Japan
AU - Mino, Yoshio
AU - Oshima, Iwao
AU - Tsuda, Toshihide
AU - Okagami, Kazuo
PY - 2000/3/1
Y1 - 2000/3/1
N2 - The finding that influenza epidemics are associated with an increased risk of adult schizophrenia has been controversial. Data was obtained from Japan's governmental statistics, the Patient Survey. Index years were defined as 1957/1958, 1962, and 1965, and comparison years were defined 2 years before and 2 years after the index year. Subjects were patients with schizophrenia who were born in the index years of influenza epidemics. Periods 5 months after the influenza epidemics were defined as exposed months. Proportions of patients born during the exposed period in the index years were compared with those of patients born in the corresponding months in the comparison years. The proportions of patients born in the exposed months in the index years were not significantly different from those born in the corresponding months in the comparison years, with odds ratios around 1 in the whole country, the Kanto area, and the Shikoku/Kyushu area where a remarkable influenza epidemic was observed in 1957. No difference was observed in analyses stratified by sex. In Japan, there was no relationship between influenza epidemics and schizophrenic birth. Copyright (C) 2000 Elsevier Science Ltd.
AB - The finding that influenza epidemics are associated with an increased risk of adult schizophrenia has been controversial. Data was obtained from Japan's governmental statistics, the Patient Survey. Index years were defined as 1957/1958, 1962, and 1965, and comparison years were defined 2 years before and 2 years after the index year. Subjects were patients with schizophrenia who were born in the index years of influenza epidemics. Periods 5 months after the influenza epidemics were defined as exposed months. Proportions of patients born during the exposed period in the index years were compared with those of patients born in the corresponding months in the comparison years. The proportions of patients born in the exposed months in the index years were not significantly different from those born in the corresponding months in the comparison years, with odds ratios around 1 in the whole country, the Kanto area, and the Shikoku/Kyushu area where a remarkable influenza epidemic was observed in 1957. No difference was observed in analyses stratified by sex. In Japan, there was no relationship between influenza epidemics and schizophrenic birth. Copyright (C) 2000 Elsevier Science Ltd.
KW - Birth
KW - Epidemic
KW - Influenza
KW - Japan
KW - Schizophrenia
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U2 - 10.1016/S0022-3956(00)00003-0
DO - 10.1016/S0022-3956(00)00003-0
M3 - Article
VL - 34
SP - 133
EP - 138
JO - Journal of Psychiatric Research
JF - Journal of Psychiatric Research
SN - 0022-3956
IS - 2
ER -