在急診看頭痛病人時...

Source: Practical Neurology 2008;8:335-343

• Headache affects 95% of people in their lifetime
• Headache affects 75% of people in any one year
• One in 10 people have migraine
• One in 30 people have headache more often than not, for 6 months or more
• At least 90% of patients seen in a neurology outpatient clinic with headache will have migraine, tension type headache, or a chronic daily headache syndrome
• Sinister causes of headache are rare, perhaps 0.1% of all headaches in primary care

切記：在急診看頭痛病人時，不能用好發率來思考，要反過來，應該優先排除那 0.1% 的 sinister causes，尤其是致命的 SAH！