Abstract
Sleep questionnaires have been validated as useful instruments for patient screening and as a complement for clinical evaluation when a sleep-related breathing disorder (SRBD) is suspected. The PSQ has two versions, an abbreviated form that has been validated for the detection of SRBD, and a complete version for a global valuation of sleep disorders. A cut line was set at 33% of the item scale for the screening determination, with a sensibility and specificity of 0.85 and 0.87, respectively.
Material and methods: 62 patients in pediatric age were gathered consecutively, 53% were male with a mean age of 5.15 years old (± 3.05) to whom a conventional polysomnography (PSG) was performed because of a probable diagnosis of SAHS. The 24 items of the PSQ (validated Spanish version for SRBD) were completed at the Pediatric Outpatient Clinic. Data was compared with the following variables obtained with the PSG recording: apnea-hypopnea index (AHI), oxygen desaturation index (ODI), mean oxygen saturation, minimal oxygen saturation and the time of sleep with an SpO2 lower than 90% (CT 90).
Results: A correlation did not exist between data determinations of the PSQ with the variables obtained by the PSG (AHI, CT90, ODI, mean SpO2, min SpO2) (Adjusted R square 0.06), neither with sex nor age. Although, a good correlation index was obtained between the PSG parameters among themselves (R: 0.60-0.9, p: 0.001).
Conclusions:
In our experience, the PSQ scores do not correlate with the parameters obtained by PSG.
In our population sample, the result of the PSQ is not useful for screening patients when a sleep apnea syndrome is suspected in the pediatric age.
- © 2011 ERS