A patient tells the nurse that he experiences daytime fatigue even after 7-8 hours of sleep each night. What is the best assessment question for the nurse to ask?

A) Have you tried getting 10 hours of sleep instead of 8 hours?
B) How long are you in the rapid eye movement (REM) stage?
C) Do you also have any recent lifestyle or behavior changes?
D) Do any of your close relatives have any sleep disorders?

The best question to elicit the most pertinent information is "Do you also have any recent lifestyle or behavior changes?" The patient is getting 7-9 hours/sleep each night, which is expected for the average adult. The patient will not be able to recall an unconscious state such as REM sleep. The patient may have close relatives with sleep disorders but this does not necessarily affect the patient's own sleep habits.