Home›Cardiology› Nocturnal hypertension affects 42.5% of population samples, isolated nocturnal hypertension 17.3%
Nocturnal hypertension affects 42.5% of population samples, isolated nocturnal hypertension 17.3%High blood pressure during sleep is common in many people
Frontiers in MedicinePublished October 28, 2026DOI ↗Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease
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Key Takeaway
Recognize that nocturnal hypertension is common in community samples, but certainty is very low.
This meta-analysis pooled data from population-based and community samples to estimate the prevalence of nocturnal hypertension (NH) and study-defined isolated nocturnal hypertension (INH). The analysis included 8,282 participants for NH and 3,659 participants for INH.
The pooled prevalence of NH was 42.5% (95% CI, 33.2% to 52.3%; 95% prediction interval, 17.2% to 72.3%; I2 = 97.6%), corresponding to 3,331 cases. The pooled prevalence of INH was 17.3% (95% CI, 10.4% to 27.5%; prediction interval, 3.6% to 54.0%; I2 = 91.5%), based on 657 cases. A sensitivity analysis using non-treated denominators yielded an INH prevalence of 19.6% (95% CI, 11.4% to 31.6%).
The authors judged the certainty of evidence as very low. Substantial heterogeneity was present across studies, and a sensitivity analysis for recording-quality criteria could not be estimated from published aggregate data. No information on adverse events, funding, or conflicts of interest was reported.
The findings provide reference estimates for planning population-based studies and evaluating targeted detection strategies using ambulatory blood pressure monitoring (ABPM). However, the very low certainty and wide prediction intervals mean these prevalence figures should be interpreted cautiously and may not be directly applicable to all settings.
How this fits prior evidence
This meta-analysis provides pooled prevalence estimates for nocturnal hypertension and isolated nocturnal hypertension, extending prior coverage of hypertension epidemiology. Previous items noted that study-defined hypertension was not a statistically significant predictor of aneurysm recurrence, and that aerobic training lowers blood pressure across 26 studies. The current findings quantify the population burden of nocturnal hypertension (42.5%) and isolated nocturnal hypertension (17.3%), which may inform detection strategies using ABPM. However, the very low certainty evidence and high heterogeneity limit direct comparison with prior hypertension-related findings.
High blood pressure is a major health concern, but it does not always stay the same throughout the day. New data shows that many people experience a specific type of high blood pressure that only occurs while they are asleep. This is known as nocturnal hypertension.
Researchers looked at data from over 11,000 people in various community settings. They found that 42.5% of those studied had nocturnal hypertension. Additionally, about 17.3% of people had isolated nocturnal hypertension, which means their blood pressure only spikes during the night. These numbers suggest that nighttime blood pressure is a common issue for many people.
While these findings are helpful for planning how to track blood pressure in large groups, the researchers noted that the certainty of this evidence is currently low. Because the data comes from various sources, it is hard to know exactly how much the quality of recording equipment affected the results. Talk to your doctor about how your specific blood pressure patterns might affect your health.
What this means for you:
About 42.5% of people in the study had high blood pressure during the night.
Common questions
How common is high blood pressure at night?
The study found that 42.5% of the 8,282 participants had nocturnal hypertension. This means that high blood pressure during sleep is quite common in the general population.
What is isolated nocturnal hypertension?
Isolated nocturnal hypertension was found in 17.3% of the 3,659 participants. This refers to cases where high blood pressure is specifically identified during the night.
How certain are these findings?
The researchers noted that the certainty of this evidence is currently judged as very low. This is partly because it is hard to tell how much the quality of the recording equipment affected the final numbers.
BackgroundNocturnal hypertension (NH) and isolated nocturnal hypertension (INH) require nighttime blood pressure assessment, but published prevalence estimates differ in sampling, treatment eligibility, and ambulatory blood pressure monitoring (ABPM) protocols.ObjectiveThis study aimed to summarize NH and study-defined INH proportions in population/community samples.MethodsFour databases were searched through 17 March 2026. Logit random-effects models used restricted maximum likelihood and modified Hartung–Knapp confidence intervals (CIs). Risk of bias was assessed using the nine-item Joanna Briggs Institute (JBI) 2017 checklist. Clinical/occupational and circadian-pattern reports were described individually rather than pooled.ResultsNine NH estimates from four sources included 8,282 participants and 3,331 cases. Pooled prevalence was 42.5% (95% CI, 33.2%–52.3%; approximate 95% prediction interval, 17.2%–72.3%; I2 = 97.6%). Four INH estimates included 3,659 participants and 657 cases; the descriptive pooled proportion was 17.3% (95% CI, 10.4%–27.5%; prediction interval, 3.6%–54.0%; I2 = 91.5%). INH denominators differed by treatment eligibility; a sensitivity analysis using reported non-treated denominators yielded 19.6% (95% CI, 11.4%–31.6%). Certainty was judged very low. A sensitivity requiring both original nighttime recording-quality criteria could not be estimated from the published aggregate data.ConclusionsNH and INH were common in the population-based and community samples studied. These findings provide reference estimates for planning population-based studies and evaluating targeted detection strategies using ABPM.Systematic Review Registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD420251233166, identifier PROSPERO CRD420251233166.
