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Table 1 Baseline characteristics of the study populations

From: Instrument completion and validation of the patient-reported apnea questionnaire (PRAQ)

  Baseline population (n = 180) Test-retest population (n = 105) Population with follow-up after CPAP (n = 53)
Gender 31.7% female 38.1% female 25.0% female
Age (mean (SD)) 50.1 (12.6) 50.4 (13.0) 55.8 (10.9)
Baseline AHI (mean (SD)) 25 (23) (n = 160a) 27 (25) (n = 96a) 41 (22)
BMI (mean (SD)) 28.9 (4.7) 28.3 (4.6) 30.4 (4.2)
ESS score (mean (SD)) 9.9 (4.7) 9.6 (4.4) 9.8 (4.7)
ESS score ≥ 11 43% 42% 40%
Sleep study (type) 43% PG /57% PSG (n = 160*) 39%PG /61% PSG (n = 96*) 43%PG/ 57%PSG
CPAP compliance (mean (SD)) N/A N/A 6:46 h (1:40 h)
CPAP compliance ≥4 h/night N/A N/A 96%
AHI with CPAP (mean(SD)) N/A N/A 2.6 (3.4)
  1. AHI Apnea-Hyponea Index, BMI Body Mass Index, ESS Epworth Sleepiness Scale, PG = polygraphy, PSG polysomnography
  2. a. 20 patients with suspected OSA of the total study population did for various reasons (choose to) not undergo a sleep study to determine their AHI