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【medical-news】白日瞌睡可能是中风的征兆
CHICAGO (Reuters) - Older people who have significant trouble staying awake during the day have more than four times the normal risk of having a stroke, U.S. researchers said on Thursday.
They also found a higher risk of heart attacks and other cardiovascular problems in seniors who regularly nod off during the day without planning to.
"Even when we controlled for things like hypertension, diabetes, physical activity, obesity and socioeconomic status, we found that people who had significant daytime dozing were much more likely to end up with stroke," said Bernadette Boden-Albala of Columbia University in New York.
Her study of 2,153 adults with an average age of 73 found the risk of stroke was 2.6 times greater for those classified as doing "some dozing" during the day compared to those with "no dozing." Those in the "significant dozing" group had a 4.5 times greater risk.
The study, presented at an American Stroke Association conference in New Orleans, is one of the first to look at the relationship between unplanned napping and "vascular events" such as stroke.
Other studies have found that people with sleep apnea who briefly stop breathing throughout the night are at high risk of stroke. This can cause daytime sleepiness.
Boden-Albala's study involved mostly Hispanic men and women over 40 living in the same community in New York City. None had suffered a stroke.
The researchers asked people to rate how often they dozed in specific situations, such as watching TV, sitting quietly after a lunch without alcohol and stopping briefly in traffic while driving. Some 44 percent reported no dozing, 47 percent had some dozing and 9 percent reported significant dozing.
After 2 1/2 years, they checked to see how many had strokes or other vascular problems, such as a heart attack. They detected 40 strokes and 127 other vascular events.
UNCERTAIN CAUSE 编译：
美国研究人员发现，白天常打瞌睡的老年人中风的几率是睡眠状态正常老年人的四倍。此外，白天作息无规律、经常打瞌睡的老年人，更容易患心脏病以及其他心血管疾病。
美国中风协会在新奥尔良召开的会议上，纽约哥伦比亚大学Bernadette Boden-Albala公布了一项队列研究结果。研究对象为2153名老年人，平均年龄73岁，无中风史。主要为纽约同一社区40岁以上的西班牙裔男性和女性。研究人员调查了他们在看电视、无饮酒的午餐后***、驾车途中等待的时候打瞌睡的频率。约44 ％的人无瞌睡，47 ％偶尔瞌睡，9 ％明显瞌睡。随访两年半的时间，这些老年人中有40人发生了中风，127人患有心血管疾病。在调整高血压、糖尿病、体力活动、肥胖和社会经济状况变量后，结果发现白天“经常打瞌睡”、“偶尔打瞌睡”老年人中风的危险分别是“从不打瞌睡”老年人的4.5倍和2.6倍。
目前导致白天瞌睡的具体原因尚不清楚，可能与晚上睡觉打呼噜导致呼吸暂停有关。不论是睡眠剥夺或睡眠呼吸暂停，生理学的改变可能与增加的中风危险有关，还需要进一步研究。这是首次研究无规律打盹与血管类疾病（如中风）之间关系的报告之一。其他研究结果发现，晚上睡觉打呼噜导致呼吸停滞的人患中风的机率更高。
美国南卡罗来纳大学的Steven Hooker在此次会议首次提出有氧运动对预防中风的益处。他对6000多名的样本人群进行了研究，发现在中年时期进行少量适度的有氧运动，即使有患心脏病、糖尿病等其它疾病的危险，也足以降低中风的危险。 [标签:content1][标签:content2]
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作者:admin@医学,生命科学 2011-05-08 17:14
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