From: Association between visual impairment and sleep duration: analysis of the 2009 National Health Interview Survey (NHIS)
Visual impairment
Short sleep,* < 6 hours
OR
95% C.I
Model A
1.8
1.6-2.0
Model B
1.6-2.1
Model C
1.6
1.5-1.9
Long sleep,* > 8 hours
2.3
2.0-2.8
1.5-2.1
1.3-1.9