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. Author manuscript; available in PMC: 2013 Jul 23.
Published in final edited form as: J Occup Environ Med. 2012 Jul;54(7):851–858. doi: 10.1097/JOM.0b013e31824e6913

Figure 1. Frequencies of Sleep Deficiencies.

Figure 1

Subjects (n=1516 without missingness) with short sleep duration (<6h/day, red circle; D), sleep insufficiency (never/rarely feeling rested on waking; green; S), and/or insomnia symptoms (3 or more times a week, blue; I) are depicted.