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Table 3 Velum concentric collapse in positional and non-positional obstructive sleep apnea

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

Collapse Pattern Positional OSA (n = 174) Non-positional OSA (n = 56) P value*
Level Configuration Degree n (% within Position OSA) n (% within Non-position OSA)
Velum Concentric 0 64 (36.8%) 10 (17.9%) 0.004
1 7 (4.0%) 0 (0%)  
2 103 (59.2%) 46 (82.1%)  
  1. OSA Obstructive sleep apnea
  2. *Chi-square test and Fisher’s exact test
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