Seasonal peaks in hospitalizations for mood disorders and schizophrenia are well recognized and often replicated. The within‐subject tendency to experience illness episodes in the same season, that is, seasonal course, is much less established, as certain individuals may temporarily meet criteria for seasonal course purely by chance.

中文翻译：

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横断面和受试者内季节性和住院规律：情绪障碍和精神分裂症的人群研究

情绪障碍和精神分裂症住院的季节性高峰是公认的，而且经常重复出现。在同一季节内（即季节性病程）经历疾病发作的受试者内部趋势远没有建立，因为某些人可能只是偶然地临时满足季节性病程标准。