Table 1.
Demographics of the participants in the survey (total n = 469).
Table 2.
Most common causes of blindness/visual impairment.
Figure 1.
Partial residual plot showing the effect of age on total nightly sleep duration of all subjects (n = 469).
No differences in sleep duration were found between the three different subject groups. Dashed lines indicate 95% confidence intervals.
Figure 2.
Distribution and frequencies of self-reported sleep complaints across the three subject groups.
RLP – reduced light perception, LP – light perception in both eyes, FS – fully sighted. In each case, the mean number of sleep complaints is indicated by a vertical dashed line.
Figure 3.
Distribution and frequencies of PSQI scores across the three subject groups.
RLP – reduced light perception, LP – light perception in both eyes, FS – fully sighted. In each case, the mean PSQI score is indicated by a vertical dashed line.
Table 3.
Incidence of self-reported sleep disturbances and mean Pittsburgh Sleep Quality Index (PSQI) in the six different sub-groups of the blind and visually impaired respondents.
Table 4.
Statistically significant differences in the rates of self-reported sleep disturbances across the three subject groups.
Table 5.
Sleep disturbances in respondents with one or more sleep problem.
Table 6.
Sleep medications prescribed to people presenting to their General Practitioner.