Table 3.: Responses to the PDSS questions.

  Events "sometimes/seldom/never" Events "always/frequently"
PDSS score Mean ± SD: 12.2 ± 4.5
   Range: 0 - 28
Sum answers of Q1-Q8 106 (40.3%) 157 (59.7%)
Answer to Q1: "fall asleep or get drowsy during class periods" 240 (90.6%) 25 (9.4%)
Answer to Q2: "get sleepy or drowsy while doing your homework" 243 (91.7%) 22 (8.3%)
*Answer to Q3: "usually alert most of the day" 16 (6.0%) 249 (94.0%)
Answer to Q4: "ever tired and grumpy during the day" 236 (89.4%) 28 (10.6%)
Answer to Q5: "have trouble getting out tobed in the morning" 215 (81.1%) 50 (18.9%)
Answer to Q6: "fall back to sleep after being awakened in the morning" 235 (88.7%) 30 (11.3%)
Answer to Q7: "need someone to awaken you in the morning" 168 (63.6%) 96 (36.4%)
Answer to Q8: "you need more sleep" 180 (67.9%) 85 (36.4%)
     

* The events of daytime sleepiness should be reversed for the answer to Q3.

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