Published in:
Open Access 30-11-2021 | Epidemiology • Short Communication
Validation of the National Health And Nutritional Survey (NHANES) single-item self-reported sleep duration against wrist-worn accelerometer
Published in: Sleep and Breathing | Issue 4/2022
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Purpose and methods
This study aimed to validate the single-item sleep duration question used in the National Health And Nutritional Survey (NHANES), “How much sleep do you usually get at night on weekdays or workdays (hours)?”, against a wrist-worn accelerometer (ActiGraph GT3X +) in waves 2011–2012 and 2013–2014 among an adult population aged 20 or above (n = 8,438, mean age 49.7, 48% male).
Results
The accelerometer-measured and self-reported sleep duration were 6.01 (SD 1.48) and 6.88 (SD 1.40) h/day, respectively, representing a 0.87 h/day of over-reporting (SD 1.90, p < 0.001). Such an over-reporting was observed in all subgroups, where the over-reporting ranged from 0.72 (those aged 41–50) to 1.13 h/day (those aged 71 or above). The correlation between accelerometer-measured and self-reported sleep duration was low (ρ = 0.14, p < 0.001).
Conclusions
The associations between sleep duration and other health outcomes identified using NHANES data should be further tested using more accurate and valid measures of sleep duration.