Length of psychiatric hospital stay is higher for patients admitted in the months of April and May. This effect was strongly associated with handedness and was greatest for left-handers. The duration of hospitalization of left-handed subjects admitted in April and May was, on average, 88.5% longer than for left-handed subjects admitted during any other period. In contrast, length of stay for right-handed patients differed by no more than 16% between any months compared.
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