This forest plot displays 4 crossover studies and 3 parallel design trials. The trials have homogeneous results with net differences ranging from 1.7 to 3.3 events per hour. Overall, the summary net difference was 1.1 events per hour (95 percent confidence interval 2.4 to 0.2), P=0.100, with no statistical heterogeneity (I-squared = 0 percent, P=0.45). The results of the crossover studies (summary estimate 1.0 events per hour) are similar to results of the parallel design trials (summary estimate 0.7 events per hour).

Figure 17Meta-analysis of arousal index (events/hr) in randomized controlled trials of autoCPAP vs. CPAP, by study design

AHI = apnea-hypopnea index, AI = arousal index, autoCPAP = autotitrating CPAP, CI = confidence interval, CPAP = continuous positive airway pressure, Fixed = fixed pressure CPAP.

From: Results

Cover of Diagnosis and Treatment of Obstructive Sleep Apnea in Adults
Diagnosis and Treatment of Obstructive Sleep Apnea in Adults [Internet].
Comparative Effectiveness Reviews, No. 32.
Balk EM, Moorthy D, Obadan NO, et al.

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