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Table 1 Demographic and physiologic data of the study cohort

From: Effect of arterial blood bicarbonate (HCO3) concentration on the accuracy of STOP-Bang questionnaire screening for obstructive sleep apnea

Parameters OSA non-OSA
Sex   
Male 108 15
Female 12 9
Age (years) 45.0 ± 12.9 39.3 ± 15.7
Neck circumference (cm) 41.9 ± 3.7 37.4 ± 3.7
BMI (kg/m2) 27.7, 4.8 24.9 ± 4.9
AHI 52.9 ± 27.0 2.4 ± 0.9
CT90 (%) 17.0, 38.0 0.1, 0.3
AHT (%) 40.2 ± 21.7 2.0, 1.7
MAD (s) 27.5 ± 7.5 26.5, 9.1
HAD (s) 1446.7 ± 781.0 72.7, 58.5
HCO3 (mmol/L) 25.6 ± 1.3 24.0 ± 1.4
PaCO2 (mmHg) 40.6 ± 3.7 38.0 ± 3.5
LSaO2 (%) 73.2 ± 13.0 90.0, 3.8
MSaO2 (%) 94.1, 3.0 97.0 ± 1.1
SBQ 5.0, 1.0 3.0, 3.0
ESS 13.8 ± 4.9 9.1 ± 5.2
Berlin Questionnaire   
Positive 95 15
Negative 25 9
  1. BMI = body mass index, AHI = apnea hypopnea index, CT90% = percentage of total sleep time when blood oxygen is less than 90%, AHT% = duration of apnea hypopnea in total sleep time, MAD = mean apnea–hypopnea duration, HAD = duration of apnea hypopnea per hour, LSaO2 = lowest blood oxygen saturation, MSaO2 = mean blood oxygen saturation, SBQ = STOP-Bang questionnaire, ESS = Epworth Sleepiness Scale