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Table 4 Results of the odds ratio analysis for factors that were possibly associated with an intellectual disability (i.e., IQ < 75 or attendance in special education classes)

From: Neurodevelopmental outcome and respiratory management of congenital central hypoventilation syndrome: a retrospective study

  Number of patients Intellectual disability No intellectual disability   
  (n = 88, %)    Odds  
   n n   95% confidence interval
  Male/Female    ratio*  
With tracheostomy
(before 3 months in life)
16 (18)
9/7
4 12 1.00 (Reference)
With tracheostomy
(after 3 months in life)
47 (53)
33/14
29 18 3.80 1.00–14.37
Without tracheostomy 25 (28)
12/13
14 11 4.65 1.11–19.37
  1. aAdjusted for patients’ age and hypoventilation on awakening
  2. Confounding factors included the age of the patients and hypoventilation on awakening, which differed significantly between the treatment groups