Anderson Neil, Feigin Valery, Bennett Derrick, Broad Joanna, Pledger Megan, Anderson Craig, Bonita Ruth
Department of Neurology, Auckland Hospital, Auckland, New Zealand.
N Z Med J. 2004 Sep 24;117(1202):U1078.
To determine (via a population-based study in Auckland, New Zealand) if there are diurnal, weekly, or seasonal variations in the occurrence of stroke.
All new stroke events in Auckland residents were traced. Time of onset of the stroke was defined as the time when neurological symptoms were first noticed. The day of the week and month of onset were analysed for all strokes.
1711 patients were registered over 1 year. The rate ratios for the onset of stroke in each 6-hourly interval compared with reference interval (1800-2359 hours) were 0.74 (95% CI: 0.61-1.10) for 0000-0559 hours, 2.88 (95% CI: 2.48-3.34) for 0600-1159 hours and 1.74 (95% CI: 1.49-2.05) for 1200-1759 hours. Rate ratios of the seasonal occurrence of stroke compared with spring were 0.75 (95% CI: 0.65-0.86) for summer, 0.83 (95% CI: 0.73-0.95) for autumn and 1.08 (95% CI: 0.96-1.23) for winter. No weekly pattern of stroke occurrence was observed.
Strokes were less likely to occur during the summer and autumn than in the winter or spring. There was an increase in the occurrence of stroke in the late morning. The results have implications for the provision of acute stroke services in the community and in hospital.
（通过在新西兰奥克兰进行的一项基于人群的研究）确定中风的发生是否存在昼夜、每周或季节性变化。
追踪奥克兰居民中所有新的中风事件。中风发作时间定义为首次注意到神经症状的时间。分析所有中风发作的星期几和月份。
1年期间登记了1711名患者。与参考时间段（18:00 - 23:59）相比，每6小时间隔内中风发作的率比在00:00 - 05:59为0.74（95%置信区间：0.61 - 1.10），06:00 - 11:59为2.88（95%置信区间：2.48 - 3.34），12:00 - 17:59为1.74（95%置信区间：1.49 - 2.05）。与春季相比，中风季节性发作的率比夏季为0.75（95%置信区间：0.65 - 0.86），秋季为0.83（95%置信区间：0.73 - 0.95），冬季为1.08（95%置信区间：0.96 - 1.23）。未观察到中风发作的每周模式。
与冬季或春季相比，夏季和秋季中风发生的可能性较小。上午晚些时候中风发生率增加。这些结果对社区和医院急性中风服务的提供具有启示意义。
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