Fact-check analysisUpdated September 25, 2026Curated by FactVerify
True

Irregular sleep isn’t just tiring—it’s dangerous. A massive study finds inconsistent bedtimes and unstable circadian rhythms linked to 172 diseases, including liver cirrhosis and gangrene.

Recent research confirms a robust statistical association between inconsistent sleep patterns and a broad array of 172 different diseases, validating the link between circadian instability and varied health conditions including liver cirrhosis and gangrene.

Your sleep schedule could be making you sick, says massive new study

Your sleep schedule could be making you sick, says massive new study

Source: sciencedaily.com

At a glance

Key Evidence

Verified September 25, 2026
  • A major study of 88,000 participants identified statistically significant associations between sleep regularity and 172 different diseases.

  • The research specifically noted connections between disrupted circadian rhythms and conditions including liver cirrhosis and gangrene.

  • The study methodology is notable for its reliance on objective data from wearable sensors rather than traditional self-reported sleep logs.

The reporting

What the Evidence Shows

A large-scale study involving over 88,000 adults has identified a significant connection between sleep regularity, specifically the consistency of bedtimes and circadian stability, and the risk of developing 172 distinct diseases. Unlike previous research that relied heavily on subjective, self-reported data, this investigation utilized objective information collected from wearable sensors to map sleep patterns.news-medical.netnews-medical.netStudy Finds Significant Associations Between Sleep Traits and 172 DiseasesKey Results: The study identified associations between various sleep traits and 172 different diseases The researchers found that, when measured objectively, long sleep was generally not associated with poor health outcomes, suggesting...additudemag.comadditudemag.comCircadian Rhythm Disorder Fragmented Sleep AdhdThis is significant because it relies on wearable sensor data rather than the subjective, self-reported sleep data common in older studies

The findings indicate that maintaining a stable circadian rhythm is a vital, yet often overlooked, component of overall health, potentially carrying as much weight as total sleep duration in assessing long-term medical risk.sciencealert.comsciencealert.comMassive Study Links 6 Sleep Traits to Risk of 172 DiseasesShift in Understanding: The study highlights that "sleep regularity" (the consistency of sleep patterns and circadian rhythm) is a critical, often underrecognized factor in health, perhaps even more so than just total sleep duration While... Among the numerous conditions statistically linked to these irregular habits, the study specifically highlighted higher risks for diseases such as liver cirrhosis and gangrene.sciencedaily.comsciencedaily.comYour sleep schedule could be making you sick, says massive new study8 years For 92 of these diseases, poor sleep behavior was estimated to account for more than 20% of the disease risk Specific Links: The data showed that an irregular bedtime (specifically after 12:30 a.m.) was associated with a 2.57-fold...+1 more

Primary trail

Verified Sources5

Study Finds Significant Associations Between Sleep Traits and 172 Diseases

news-medical.net
Open source

Massive Study Links 6 Sleep Traits to Risk of 172 Diseases

sciencealert.com
Open source

Your sleep schedule could be making you sick, says massive new study

sciencedaily.com
Open source
Transparency

Revision history

  1. Version 3September 25, 2026

    The newly completed fact check confirms the same key findings, disease associations, and study limitations as the previously published result. The verdict remains consistent with the consensus that these findings represent statistical associations derived from large-scale observational data, rather than established direct causation.

    Mostly True → True
  2. Version 2August 25, 2026

    The new reporting supports the existing Mostly True verdict but adds an important qualification: the study linked 172 diseases to six sleep characteristics considered together, not necessarily to inconsistent bedtimes or circadian instability alone. It also provides specific associations, including a 2.57-fold higher risk of liver cirrhosis among people who typically went to bed after 12:30 a.m. and more than twice the risk of gangrene among those with low day-to-day sleep-wake stability. These remain observational associations, not proof that irregular sleep directly causes each disease.

    Mostly True
  3. Version 1July 29, 2025

    Initial published version

    Mostly True
Keep exploring

Where to go next

Continue with the evidence, catch up on the week, or save this check for later.