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This is a blog about the scientific basis of medicine. A judo therapist reads research papers for study and writes about them.

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Study says 7 days is enough time to record sleep.

Saturday, May 1, 2021

Sleep

In this article, I'll talk about checking the quality of your sleep.

Do you ever suffer from poor sleep quality?

If you are not satisfied with your sleep, it will affect your daily life, and you want to do something about it.One way to do this is to keep a record of how long you sleep, but do you know how long it is useful to keep a record?

Here is a study that investigates the number of days to record.

Contents of the study

Recording sleep is important for epidemiological studies of disorders and diseases that may be related to sleep deprivation and limitation.

The purpose of the current study was to test how many days and weeks are needed to apply a reliable sleep diary.

The study was conducted with 53 male and female participants.

Volunteers completed a morning and evening questionnaire to later identify their chronotype.

Afterwards, they received a sleep diary in which they filled in periods of 28 consecutive days (or 4 weeks) of nocturnal sleep.

Participants were instructed to describe the time they began to fall asleep and woke up within one hour of waking.

As a result, there was no difference in the amount of time participants slept from week to week.Participants slept longer on Sundays and Saturdays compared to other days of the week.

The reliability value of the sleep diary increased as the number of nights increased, reaching adequate reliability (≥0.70) recorded for seven consecutive days.

Borba DA, Reis RS, Lima PHTM, et al. How many days are needed for a reliable assessment by the Sleep Diary? Sleep Sci. 2020;13(1):49-53. doi:10.5935/1984-0063.20190131

Conclusion

The results suggest that if you want to record your sleep and make changes in your health, it is recommended to record it for 7 days.

There is nothing more to say, so that's all I'll say.

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