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Table 2 Mean AHI according to the level and degree of collapse

From: The relationship between upper airway collapse and the severity of obstructive sleep apnea syndrome: a chart review

Velopharynx collapse n (%) Mean AHI (events per hour) Standard deviation (events per hour)
Minimal 30 (6) 17 11
Moderate 41 (9) 25 15
Significant 392 (85) 27 21
r = 0.069 (95 % CI; −0.022, 0.16)
Base of Tongue Collapse
Minimal 144 (28) 19 12
Moderate 187 (37) 24 19
Significant 175 (35) 33 23
r = 0.26 (95 % CI; 0.18, 0.34)
Lateral Pharyngeal Wall Collapse
Minimal 158 (41) 20 16
Moderate 109 (28) 25 19
Significant 120 (31) 33 25
r = 0.22 (95 % CI; 0.12, 0.31)
  1. This table shows the mean AHI value at each degree of UA collapse (minimal = airway collapse of 0-50 %; moderate = airway collapse of 51–75 %; severe = airway collapse of 76–100 %). r and CI values are marked after each analysis