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Table 5 Subjective (Questionnaires) Measures of Nocturnal Sleep and Daytime Sleepiness

From: Nocturnal sleep, daytime sleepiness, and quality of life in stable patients on hemodialysis

Variable Mean Median Mode
Typical sleep duration 377.7 (78.9) 360.0 420.0
How often they felt rested upon awakening in the morning* 3.0 (1.0) 3.0 3.0
How often they had trouble *:    
• Falling asleep 2.9 (1.2) 3.0 3.0
• Waking up at night 2.5 (1.2) 2.0 2.0
• Waking up too early and not being able to fall asleep 2.8 (1.1) 3.0 3.0
How often legs kicked or twitched* 1.9 (1.0) 2.0 1.0
How often awake gasping/choking* 1.6 (1.0) 1.0 1.0
How often they napped* 2.7 (1.1) 3.0 3.0
Epworth Sleepiness Scale 7.4 (4.6) 7.0 6.0
  1. * 0 = don't know (classified as missing data and not included in the analyses), 1 = never, 2 = rarely, 3 = sometimes, 4 = most of time, 5 = always