Screening for Obstructive Sleep Apnea in Adults: Evidence Report and Systematic Review for the US Preventive Services Task Force.
Level 1 - systematic review of randomized trials
Systematic review and meta-analysis of randomized controlled trials and diagnostic accuracy studies
PubMed 28118460 · doi:10.1001/jama.2016.19635
What was done
Systematic review and meta-analysis conducted for the US Preventive Services Task Force to evaluate primary care screening for obstructive sleep apnea (OSA), diagnostic test accuracy, and treatment effectiveness. Searches covered MEDLINE, Cochrane Library, EMBASE, and trial registries through October 2015 with surveillance through October 2016. English-language randomized clinical trials, diagnostic accuracy studies of questionnaires and portable monitors, and community cohort studies assessing the apnea-hypopnea index (AHI) were included. Two investigators independently reviewed studies, and random-effects meta-analyses were conducted when appropriate.
What was found
A total of 110 studies were included (N = 46,188). No randomized trials directly compared screening with no screening. In 2 studies (n = 702), the screening accuracy of the multivariable apnea prediction score followed by home portable monitor testing for detecting severe OSA syndrome had AUCs of 0.80 (95% CI, 0.78 to 0.82) and 0.83 (95% CI, 0.77 to 0.90). Meta-analysis demonstrated that continuous positive airway pressure (CPAP) compared with sham significantly reduced AHI (weighted mean difference [WMD], -33.8 [95% CI, -42.0 to -25.6]; 13 trials, 543 participants), Epworth Sleepiness Scale score (WMD, -2.0 [95% CI, -2.6 to -1.4]; 22 trials, 2721 participants), diurnal systolic blood pressure (WMD, -2.4 points [95% CI, -3.9 to -0.9]; 15 trials, 1190 participants), and diurnal diastolic blood pressure (WMD, -1.3 points [95% CI, -2.2 to -0.4]; 15 trials, 1190 participants). CPAP provided modest improvement in sleep-related quality of life (Cohen d, 0.28 [95% CI, 0.14 to 0.42]; 13 trials, 2325 participants). Mandibular advancement devices and weight loss also reduced AHI and sleepiness. Cohort studies showed a consistent association between AHI and all-cause mortality, but treatment trials have not established mortality reduction.
Why it matters
While treatments like CPAP improve intermediate markers such as sleepiness and blood pressure, direct evidence is lacking on whether routine primary care screening accurately detects asymptomatic OSA or improves long-term health outcomes.
Limits
Zero trials evaluated the direct clinical utility of screening versus no screening on health outcomes. Screening accuracy studies oversampled high-risk and symptomatic populations, limiting applicability to general primary care. Treatment trials were not designed or powered to demonstrate reductions in mortality or cardiovascular events.
Cited by
- supports Sleep apnea is strongly associated with increased long-term mortality risk, impaired cognitive function, mood dysregulation, reduced athletic performance and recovery, and poor metabolic health.