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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