The first-line treatment for a cough related to an upper res…

Questions

Nick cоmplаins оf dаytime sleepiness, frаgmented sleep and sоme vivid dreams during sleep. He presented to the sleep clinic for evaluation and was sent for a PSG with MSLT. During the nocturnal PSG, Nick's total sleep time was 345 minutes. His AHI was 4.9/hour. He proceeded with the daytime test and slept on 5/5 naps with a mean sleep latency of 11 minutes. He had REM on nap 1.    There are two parts to this question for credit:  1. Is this test valid? Why or why not?  2. What diagnosis would you give Nick based on these results?