Table 1: Characteristics and visit frequency of analytic samples for the OSA and comparison groups.

OSAComparison value

Child  level
Total number of children338245
 Gender, %
  Boys46.549.00.55
  Girls53.651.0
 Age at referral, %
  2–5 y11.013.9
  6–8 y35.525.3
  9–10 y27.233.1
  11–18 y26.327.8
  Mean (SD)8.7 (2.6)8.8 (2.8)0.47
 Race, %
  White5.63.30.10
  Black51.861.6
  Hispanic24.018.8
  Others18.616.3
 Language, %
  English74.384.10.01
  Spanish21.014.3
  Others4.71.6
Prevalence of obesity at baseline, %93.591.00.27
Baseline BMI, mean (SD)26.5 (3.9)26.2 (4.6)0.37
Baseline BMI -score, mean (SD)2.3 (0.5)2.2 (0.5)0.03
Number of all-type visits, mean (SD)5.5 (3.2)2.5 (1.2)<0.001
Number of OSA visits, mean (SD)2.7 (1.9)N/A
Duration of OSA intervention in months, mean (SD)9.5 (6.9)N/A
Time after referral at the last visit (months)
 0–6 months21.219.2
 7–12 months11.011.8
 13–15 months24.915.4
 16–18 months11.411.0
 19–21 months13.916.6
 22–24 months17.626.0
 Mean (SD)14.8 (7.2)13.3 (7.7)0.01
Visit  level
Total number of visits1855615
Time after referral in months,
mean (SD)
8.4 (7.0)8.1 (8.0)0.49