Sleep paralysis1 episodes typically occur either early in the night, as someone is falling asleep, or towards the end of the night, as someone is waking up. Stressful life events, anxiety, sleep quality and genetics are all linked to it.

睡眠癱瘓癥一般發生在晚間剛入睡時，或者凌晨正要蘇醒時。生活重壓、焦慮情緒、睡眠水平、與基因遺傳都與之有關。

In a recent UK study, nearly 30 per cent of respondents said that they had experienced at least one episode of sleep paralysis in their lifetime.

在英國近期的一次調查中，近30%的受訪者稱過去歷程過至少一次睡眠癱瘓癥。