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You may be sleeping more (or less) than you think

You may be sleeping more (or less) than you think
16th October 2007

Patients asked how much sleep they get tend to give the wrong information, according to new research.

In a comparison of the sleep times given by respondents and those registered on a sleep test, there were some significant discrepancies.

The Sleep Heart Health Study Sleep Habits Questionnaire generated three distinct sets of data: the amount of sleep participants felt they had habitually; the length of time they believed they had slept the previous night and the amount of sleep they had had according to the test.

The results showed that the mean habitual sleep time was 422 minutes, while the mean morning estimated sleep time was 379 minutes and the average total sleep time was 363 minutes.

Study author Dr Graciela Silva said: "The findings from this study suggest that results from studies subjectively assessing sleep times may not be comparable to those using objective determinations."

Obese and higher educated people reported sleeping less in the study.

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