Sleep paralysis
Table:
Sleep paralysis

The Nightmare by Henry Fuseli (1781) is thought to be a depiction of sleep paralysis perceived as a demonic visitation.
Specialty	Sleep medicine
Symptoms	Awareness but inability to move during waking or falling asleep[1][2]
Duration	Less than a couple of minutes[2]
Risk factors	Narcolepsy, obstructive sleep apnea, alcohol use, sleep deprivation[1][2]
Diagnostic method	Based on description[2]
Differential diagnosis	Narcolepsy, atonic seizure, hypokalemic periodic paralysis, night terrors[1][2]
Treatment	Reassurance, sleep hygiene, cognitive behavioral therapy, antidepressants[1]
Frequency	8–50%[2]

With reference to the table, decide if the statement is entailed, neutral, or refuted by the data. Provide the verdict inside {"answer": "YOUR ANSWER"} as JSON.

Claim: Sleep paralysis is sometimes estimated to occur in half of people.

answer: entailed