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Table 1 Demographic, physical examination, and sleep study data

From: Role of drug-induced sleep endoscopy in evaluation of positional vs non-positional OSA

Variables Total (n = 230) Positional OSA (n = 174) Non-positional OSA (n = 56) P value*
Mean ± SD Mean ± SD Mean ± SD
Demographic data
 Sex     .219
  Male 166 (72.2%) 122 (70.1%) 44 (78.6%)  
  Female 64 (27.8%) 52 (29.9%) 12 (21.4%)  
 Age, years 48.37 ± 11.50 48.71 ± 11.30 47.34 ± 12.14 .416
 BMI, kg/m2 27.50 ± 4.33 26.68 ± 3.85 30.05 ± 4.76 < 0.001
 Neck circumference, cm 38.26 ± 3.84 37.70 ± 3.47 40.01 ± 4.42 .002
 Epworth Sleepiness Scale 9.94 ± 4.53 10.08 ± 4.23 9.52 ± 5.39 .112
Physical Examination
 Tonsil Size 1.39 ± 0.69 1.40 ± 0.68 1.38 ± 0.73 .778
 Modified Mallampati score 3.16 ± 0.61 3.09 ± 0.62 3.38 ± 0.56 .003
Sleep Study Data
 AHI, events/hr 36.52 ± 23.44 29.94 ± 16.96 56.98 ± 28.64 < 0.001
 Supine AHI, events/hr 48.36 ± 25.39 43.86 ± 22.47 62.32 ± 28.89 < 0.001
 Lateral AHI, events/hr 18.72 ± 24.22 8.15 ± 8.32 51.56 ± 27.82 < 0.001
 ODI, events/hr 30.14 ± 23.54 23.16 ± 16.41 51.84 ± 28.76 < 0.001
 Minimal SaO2, % 77.74 ± 9.67 79.74 ± 8.75 71.52 ± 9.80 < 0.001
 T < 90%, % 15.09 ± 18.53 10.03 ± 12.63 30.80 ± 24.41 < 0.001
  1. BMI Body Mass Index, AHI Apnea-Hypopnea Index, ODI Oxygen Desaturation Index, Minimal SaO2 Minimal oxygen saturation, T < 90% The percent of the total time with oxygen saturation level lower than 90%
  2. *Mann-Whitney U test