Skip to main content

Table 2 MOS Sleep Scale Subscales and Scoringa

From: Evaluation of the impact of fibromyalgia on patients' sleep and the content validity of two sleep scales

Subscale Number of Items Brief Description (Item Number on Scale) Scoring Rangeb
Sleep disturbance 4 Trouble falling asleep (7); time to fall asleep (1); restless sleep (3); awaken during sleep (8) 0 to 100
Snoring 1 Snore during sleep (10) 0 to 100
Awaken short of breath or with headache 1 Awaken short of breath or with headache (5) 0 to 100
Quantity of sleep 1 Quantity of sleep (2) 0 to 24
Optimal sleep 1 "Optimal" sleep (2)c 0 or 1c
Sleep adequacy 2 Enough sleep to feel rested (4); amount of sleep needed (12) 0 to 100
Somnolence 3 Feel drowsy during day (6); trouble staying awake during day (9); take naps (11) 0 to 100
Sleep Problem Index IId 9 Trouble falling asleep (7); time to fall asleep (1); restless sleep (3); awaken during sleep (8); awaken short of breath or with headache (5); enough sleep to feel rested (4); amount of sleep needed (12); feel drowsy during day (6); trouble staying awake during day (9) 0 to 100
  1. a See Additional file 1 for full MOS-Sleep Scale.
  2. b Higher scores indicate more of the concept being measured (e.g., higher Sleep Disturbance scores indicate greater sleep disturbances). Quantity of Sleep scores are the patient-reported number of hours of sleep per night.
  3. c If the patient reports 7 or 8 hours of sleep per night, the Optimal Sleep score is 1; otherwise the Optimal Sleep score is 0.
  4. d Nine-item summary score, sometimes referred to as Sleep Index II. The 6-item summary scale (Sleep Index I) includes the same items, with the exception of item 1 (time to fall asleep), item 3 (restless sleep), and item 6 (feel drowsy during the day), and was developed as a briefer alternative to the 9-item index.