Abstract
Purpose: The aim of this survey was to gather data about the incidence of various sleep disorders particularly sleep apnea, in subjects with IPF who participated in a regional patient-oriented seminar on this condition. We hypothesized that the frequency of Obstructive Sleep Apnea (OSA) and psychiatric sleep disorders would be disproportionately high in the IPF population. Methods: The project was a one-time survey administered to stable patients with IPF and their family members from the South eastern USA who participated in the “Living with IPF” public seminar at the Emory University campus. The survey used a validated questionnaire, i.e., Sleep Disorders Questionnaire (SDQ), to detect presence of Sleep Apnea (SA) and selected sleep disorders - Restless Legs Syndrome (RLS), Psychiatric Sleep Disorders (PSY) and narcolepsy (NAR). The questionnaire was administered to all participants (with and without IPF), in a confidential manner. The findings were used to determine if there were differences in the incidence of SA and other sleep disorders between individuals with IPF and those without the disease. Results: A total of 52 people agreed to participate in the study. One subject was excluded due to unclear IPF status. The median SDQ raw scores in IPF patients for SA, RLS, PSY and NAR were 28.7, 27.1, 26.2 and 26.5, respectively; overall, they were not statistically different in IPF patients versus control subjects. However, as validated in other studies, patients with history of OSA had significantly higher SDQ-SA scores. Conclusions: The present study aimed to investigate cross-sectionally the incidence of self-reported sleep conditions in patients with IPF versus healthy family member controls. Overall, we did not find a disproportionately higher incidence of sleep disorders in the
Highlights
Obstructive Sleep Apnea (OSA) associated with excessive daytime sleepiness, or OSA syndrome, is estimated to occur in 1 of 20 adults or about 5% of the general population in the United States [1]
The subjects in the Idiopathic Pulmonary Fibrosis (IPF) group were generally older than the control group
More males were present in the IPF group
Summary
Obstructive Sleep Apnea (OSA) associated with excessive daytime sleepiness, or OSA syndrome, is estimated to occur in 1 of 20 adults or about 5% of the general population in the United States [1]. An epidemiological review by Young et al estimates that about 1 in 5 adults have at least mild OSA and 1 in 15 adults have at least moderate OSA [2]. Mainly due to lack of awareness by the public and healthcare professionals, the vast majority remain undiagnosed and untreated. Data from the Wisconsin Sleep Cohort study estimated that 93% of women and 82% of men with moderate-to-severe sleep apnea were undiagnosed [3]. A follow-up publication from the Wisconsin Cohort Study five years later indicated that the prevalence of OSA in people aged 30-60 years was 9-24% for men and 4-9% for women [2]
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