Irregularities in sleep timing and duration linked to increased risk of high blood pressure

A study of more than two million sleepless nights and blood pressure data found that irregularities in bedtime and duration were associated with an increased risk of high blood pressure.

The results showed that high sleep duration irregularity was associated with a 9% to 15% increase in the risk of hypertension. In addition, a 38-minute increase in sleep midpoint irregularity was associated with an 11% increased risk, and a 31-minute increase in sleep onset time irregularity was associated with a 29% increased risk of hypertension.

“This new approach to non-invasive nighttime monitoring of sleep duration and time in people’s homes for an average period of six months, combined with regular blood pressure monitoring, shows us that having a regular sleep routine and adequate sleep In terms of how important it is to your health, the health of your heart,” said lead author Hannah Scott, who has a doctorate in sleep health and a sleep health research associate at the Adelaide Institute for Sleep Health (AISH), Flinders University. . “These novel data shed new light into the restorative benefits of sleep and raise potential concerns for a substantial proportion of shift workers in our modern 24-hour society.”

Researchers analyzed data collected over nine months from 12,300 participants, aged between 18 and 90. Metrics were recorded with an under-mattress sleep device and a portable blood pressure monitor. The regularity of sleep duration was assessed as the standard deviation of the mean of the device-assessed total sleep time. The regularity of sleep timing was assessed as the standard deviation in sleep onset time and sleep midpoint. Logistic regression controlling for age, gender, body mass index and average sleep time was conducted to investigate possible associations between sleep regularity and hypertension, found in 2,499 participants.

These new insights into the potential adverse effects of irregular sleep timing and duration on cardiovascular health further highlight the importance of the role of synchronizing the body clock and prioritizing the opportunity for adequate sleep for optimal health and wellbeing.”

Danny Eckert, Senior Writer

Danny Eckert holds a doctorate in Sleep and Respiratory Physiology and is Professor and Director of AISH.

The researchers noted that prior studies of sleep and heart health are limited in sample size and have been limited over a short period of time. The current study examined the relationship between sleep regularity and hypertension in a large, global sample over several months.

This was a study commissioned by an unfunded investigator. Prescribed data was provided by Withings for unsupervised investigator-led analysis. One of the co-authors serves as a consultant for Withings.


American Academy of Sleep Medicine

Journal Reference:

Scott, H., and others. (2022) Sleep irregularity is associated with increased risk of hypertension: data from more than two million nights. Sleep,

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