Snoring: not just an annoyance, but a health hazard

Initial note: This article was previously published and updated according to scientific and divulgative criteria. The text is for informational purposes only and does not replace the advice of your doctor. If you have symptoms or concerns, consult a healthcare professional.

IN BRIEF

• Snoring is very common and can be a simple nuisance or a sign of a sleep-disordered breathing, including obstructive sleep apnea (OSA).
• OSA is associated with an increased risk of hypertension, cardiovascular events, and daytime sleepiness; severity and adherence to therapies influence outcomes.
• Diagnosis is based on clinical evaluation and sleep tests (polysomnography or home tests when indicated).
• Options range from behavioral measures and mandibular advancement devices (MAD) to CPAP and, in selected cases, surgical interventions; the choice depends on severity, preferences, and anatomical factors.
• Evidence does not support miraculous solutions: treatment must be personalized and guided by a specialized center.

Abstract: what does science say?

Snoring is the result of vibrations of the upper airway structures during sleep. It can occur in isolation or be the most evident manifestation of a more serious disorder: obstructive sleep apnea (OSA). Epidemiological studies show that habitual snoring is frequent in the adult population, with varying percentages depending on the definition and the population studied. Systematic reviews and meta-analyses indicate an association between OSA and an increased risk of hypertension and cardiovascular events, with a graded risk based on respiratory severity. Available therapies (CPAP, oral mandibular devices, selective surgical interventions) improve symptoms and some physiological parameters; the effect on major clinical outcomes (e.g., cardiovascular events) often depends on adherence and patient profile. Diagnosis remains based on sleep studies, with polysomnography as the reference test, while home tests are acceptable in selected patients. Methodological limitations, heterogeneity of studies, and individual variability require caution in interpretation: much evidence is observational or derived from trials with varying levels of adherence to therapies.

What it means in practice

For those who snore or live with a snorer, the practical message is simple: snoring can be just a sleep disturbance but, in a significant proportion of cases, it represents the most evident symptom of nocturnal apneas and potential health risks. If snoring is accompanied by observed breathing pauses, severe daytime sleepiness, waking up with morning headaches, or high blood pressure, it is appropriate to consult a specialized center for an evaluation. Polysomnography (PSG) is the reference test to confirm the diagnosis of OSA and to define its severity, while home tests can be useful in selected cases and in the absence of complex comorbidities.

For patients with OSA, the first line remains positive airway pressure therapy (CPAP) when indicated: CPAP improves sleepiness and sleep quality and remains the most effective treatment for eliminating apneas. However, the effect of treatment on major cardiac events is influenced by adherence; large trials and meta-analyses show conflicting results on overall cardiovascular benefit, with positive signals when use exceeds a few hours per night. For patients intolerant to CPAP, oral mandibular advancement devices (MAD) are an alternative recognized by guidelines for mild-to-moderate cases or in selected cases of patient preference. In some situations with anatomical abnormalities (deviated nasal septum, enlarged tonsils, palate or tongue base problems), surgical correction may be considered after multidisciplinary evaluation.

Evaluation and diagnostic pathway

Clinical evaluation and warning signs

The specialist visit gathers the sleep history, the possible presence of noisy breathing, observed pauses, saliva release, awakenings with a feeling of choking, and daytime symptoms (sleepiness, difficulty concentrating). Risk factors such as overweight, age, alcohol consumption, use of sedative medications, and comorbidities (hypertension, diabetes, cardiovascular diseases) should be evaluated. Signs suggesting the need for further sleep studies include observed apnea by others, excessive daytime sleepiness, and resistant hypertension.

Diagnostic tests: when and which ones

The reference test for the diagnosis of OSA is laboratory polysomnography (PSG), which records sleep, breathing, oxygenation, and other parameters. In selected patients without complex comorbidities, home sleep apnea testing (HSAT) can be used as an alternative to confirm the presence of OSA. The choice of test considers clinical probability, the presence of cardiac or neurological diseases, and the need to evaluate other sleep conditions. ENT and dental anatomical evaluation (nose, palate, tonsils, tongue base, mandibular morphology) is useful for identifying possible corrective interventions or for choosing appropriate oral appliances.

Therapeutic options and considerations

Non-surgical therapies

Initial measures include weight reduction in case of overweight, limiting alcohol before sleep, correcting an irregular sleep pattern, and positioning (avoiding the supine position in some patients). For moderate-to-severe OSA, CPAP is the most effective treatment for abolishing apneas and improving sleepiness and quality of life; however, the benefit on major cardiovascular events largely depends on adherence to treatment [3][4]. For patients intolerant to CPAP, oral mandibular advancement devices (MAD) reduce the apnea index and improve symptoms in selected patients; guidelines recommend prescription by a physician and management by an experienced dentist [7].

Surgical approach

Surgery is indicated in selected cases with clear anatomical abnormalities related to obstruction (e.g., deviated septum, hypertrophic tonsils, excess soft palate, or other causes of multilevel obstruction). Procedures such as uvulopalatopharyngoplasty (UPPP) can reduce the severity of apneas and snoring in specific patient groups; systematic reviews show variable results and efficacy that may decrease in the long term, so the choice requires multidisciplinary evaluation and careful patient selection [8].

KEY POINTS TO REMEMBER

• Habitual snoring is frequent and increases with age, male gender, obesity, alcohol consumption, and certain anatomical conditions. [1]
• Obstructive sleep apnea is associated with an increased risk of hypertension and cardiovascular events; the relationship shows a risk gradient with disease severity. [2][6]
• CPAP improves sleepiness and respiratory parameters; cardiovascular benefit is conditioned by adherence. [3][4]
• For road safety: sleepiness related to sleep disorders increases the risk of accidents; CPAP can reduce the risk in drivers with OSA. [5]
• Oral appliances are an alternative for selected patients and are recommended according to guidelines in cases of CPAP intolerance or patient preference. [7]

Limitations of evidence

The literature includes observational studies, randomized trials, and meta-analyses: each design has intrinsic limitations that affect causal inference. Observations linking OSA to cardiovascular diseases are often based on cohort studies that show associations but do not definitively prove causality; however, biological mechanisms are plausible (intermittent hypoxemia, sympathetic activation, inflammation). Randomized trials on the impact of CPAP on cardiovascular events show conflicting results, often complicated by low adherence in real-world conditions: beneficial effects tend to emerge in patients who use the device for more hours per night [4]. Surgical and oral appliance reviews report heterogeneity of outcomes, variations in success definitions, and different follow-up durations; therefore, interpretation requires caution and case-by-case evaluation [8].

Editorial conclusion

Snoring can be a nuisance or a warning sign of a sleep disorder with health implications. Proper management involves a structured clinical evaluation and, when indicated, objective sleep studies. Therapeutic choices require a balance between efficacy, tolerability, and patient preferences: CPAP, oral appliances, and, in selected cases, surgical interventions are valid options when part of a multidisciplinary pathway. A specialized center offers the most suitable environment for diagnosis, follow-up, and personalized therapeutic choice.

Editorial note

This article has been updated based on scientific evidence. The information reported here is for informational purposes only and is not intended to replace an individual clinical evaluation. For personalized advice, consult your doctor or a specialized center.

SCIENTIFIC RESEARCH

1. Noal RB, Menezes AMB, Canani SF, Siqueira FV. Habitual snoring and obstructive sleep apnea in adults: population-based study in Southern Brazil. Rev Saude Publica. 2008;42(2):224-233. https://doi.org/10.1590/S0034-89102008000200006
2. Xie C, Zhu R, Tian Y, Wang K. Association of obstructive sleep apnoea with the risk of vascular outcomes and all-cause mortality: a meta-analysis. BMJ Open. 2017;7:e013983. https://doi.org/10.1136/bmjopen-2016-013983
3. Giles M, et al. Association of Positive Airway Pressure With Cardiovascular Events and Death in Adults With Sleep Apnea: A Systematic Review and Meta-analysis. JAMA. 2017;318(2):156–166. https://doi.org/10.1001/jama.2017.7967
4. McEvoy RD, Antic NA, Heeley E, et al. CPAP for Prevention of Cardiovascular Events in Obstructive Sleep Apnea. N Engl J Med. 2016;375:919-931. https://doi.org/10.1056/NEJMoa1606599
5. Phillips B, et al. Continuous Positive Airway Pressure Reduces Risk of Motor Vehicle Crash among Drivers with Obstructive Sleep Apnea: Systematic Review and Meta-analysis. Sleep. 2010;33(10):1373–1380. https://doi.org/10.1093/sleep/33.10.1373
6. Hou H, Zhao Y, Yu W, et al. Association of obstructive sleep apnea with hypertension: A systematic review and meta-analysis. J Glob Health. 2018;8(1):010405. https://doi.org/10.7189/jogh.08.010405
7. Ramar K, Dort LC, Katz SG, Lettieri CJ, Harrod CG, Thomas SM, Chervin RD. Clinical Practice Guideline for the Treatment of Obstructive Sleep Apnea and Snoring with Oral Appliance Therapy: An Update for 2015. J Clin Sleep Med. 2015;11(7):773–827. https://doi.org/10.5664/jcsm.4858
8. He M, Yin G, Zhan S, et al. Long-term Efficacy of Uvulopalatopharyngoplasty among Adult Patients with Obstructive Sleep Apnea: A Systematic Review and Meta-analysis. Otolaryngol Head Neck Surg. 2019;161(3):401–411. https://doi.org/10.1177/0194599819840356

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