Joensen P
Stroke. 1984 May-Jun;15(3):438-40. doi: 10.1161/01.str.15.3.438.
In a retrospective study of a 14-year period (1962-1975) the annual incidence of subarachnoid hemorrhage (SAH) was found to be 7.4 per 100,000 in an isolated population of about 40,000. The age-specific incidences in the age groups from 15-25 to 60 years are on the same level as found in Sweden, Rochester USA, England, and Iceland, but lower than the findings in Finland. The age-specific incidence among persons over 60 years of age was far lower than in Sweden, Rochester USA, and Finland. The possible causes of the lower incidence in all age groups than reported in the above-mentioned studies are discussed. Forty patients had a history of SAH. Two months after the episode 38% had died and at the end of 5 years 53%. The recurrence rate at 5 years was 24%.
在一项为期14年（1962 - 1975年）的回顾性研究中，在一个约40000人的孤立人群中，蛛网膜下腔出血（SAH）的年发病率为每100000人中有7.4例。15 - 25岁至60岁年龄组的年龄别发病率与瑞典、美国罗切斯特、英国和冰岛的水平相同，但低于芬兰的研究结果。60岁以上人群的年龄别发病率远低于瑞典、美国罗切斯特和芬兰。讨论了所有年龄组发病率低于上述研究报告的可能原因。40例患者有蛛网膜下腔出血病史。发病后两个月，38%的患者死亡，5年后为53%。5年时的复发率为24%。
