Assessment of sleep in subjects with visual impairment: Comparison using subjective and objective methods

ABSTRACT

The objective of the present study was to verify the agreement between objective and subjective measures of sleep in people with and without visual impairment. Thirty-seven subjects with visual impairment participated in the study (19 blind without light perception and 18 low-vision), as well as 34 subjects with normal vision, with paired age and gender characteristics. For the subjective sleep evaluation, we used the Sleep Quality Index—PSQI and for the objective evaluation we used the ActiGraph GT3X+. Among the three analyzed groups, the blind was the only ones who presented differences between subjective and objective sleep duration (p = 0.021). Furthermore, the concordance between subjective and objective sleep duration (ICC = 0.388; p = 0.108) was not observed in blind subjects, and a greater variability of differences in sleep duration between the two methods was observed by the Bland Altman scatter plot. We concluded that the sleep duration obtained by PSQI did not show agreement for the objective sleep duration in blind subjects without light perception.

KEYWORDS:

• self-reporting
• sleep
• vision disorders

Declaration of interest

The authors declare no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Funding

Financial support for this work was provided by Foundation for Research and Innovation Support of the State of Santa Catarina (FAPESC).

Additional information

Funding

Financial support for this work was provided by Foundation for Research and Innovation Support of the State of Santa Catarina (FAPESC).