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Table 2 Descriptive statistics for the full sample (N = 96) for sleep latency, nighttime sleep duration, CDI-EV SS, MSEL T scores, and CBCL T scores

From: Sleep characteristics and problems of 2-year-olds with Williams syndrome: relations with language and behavior

Measure M (SD) Mdn (IQR) Rangea
Sleep latency (min) 35.35 (21.56) 30 (20–45) 5–90
Nighttime sleep duration (hr) 10.36 (1.09) 10.5 (9.8–11) 7.3–13.3
CDI-EV SS 99.50 (11.04) 98 (90.5–108) 84–130
MSEL T scores
 MSEL Expressive Language T 32.20 (10.08) 30 (22.3–38) 20–58
 MSEL Receptive Language T 31.93 (11.66) 31.5 (20–41) 20–56
 MSEL Visual Reception T 31.69 (10.16) 31 (20–40) 20–56
CBCL DSM-5-based scales
 Depressive Problems T 58.01 (6.78) 56 (52–62.3) 50–77
 Anxiety Problems T 51.38 (2.69) 50 (50–51) 50–60
 Autism Spectrum Problems T 56.32 (7.27) 54 (51–61) 50–87
 Attention/Hyperactivity Problems T 55.93 (6.72) 54 (50–60) 50–76
 Oppositional Defiant Problems T 52.16 (4.77) 50 (50–52) 50–77
CBCL 2007 Scale
 Stress Problems T 54.29 (6.27) 51 (51–56.8) 50–85
CBCL Higher-order Factor Scales
 Internalizing Problems T 50.63 (8.14) 49 (45–57.5) 29–68
 Externalizing Problems T 49.63 (9.81) 49 (42–55.8) 32–80
 Total Problems T 51.42 (8.65) 52 (44–57) 31–73
  1. CDI-EV SS MacArthur-Bates Communicative Development Inventory: Words and Sentences expressive vocabulary standard score, MSEL Mullen Scales of Early Learning, CBCL Child Behavior Checklist, IQR interquartile range, min minutes, hr hours, DSM-5 Diagnostic and Statistical Manual of Mental Disorders-5
  2. aLowest possible score: CDI-EV SS at 24 months = 84; MSEL T score = 20