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Table 1 Descriptive statistics for the Pediatric Sleep Questionnaire SRBD scale and subscales

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

SRBD scale or subscale

N

Maximum possible score

M (SD)

Mdn (IQR)

Range

N positive (%)

SRBDb

96

21a

3.74 (2.72)

3.00 (2.00–5.75)

0–11

15 (15.6%)

Snoring

92

4

0.41 (0.76)

0 (0–1)

0–3

26 (28.3%)

Sleepiness

70

4

0.51 (0.93)

0 (0–1)

0–4

21 (30.0%)

Behavior

96

6

1.99 (1.65)

2 (1–3)

0–6

75 (78.1%)

  1. SRBD Sleep-Related Breathing Disorder, IQR interquartile range
  2. aScore of 7 or higher on the SRBD scale, 1 or higher on the Snoring and Sleepiness subscales, and 2 or higher on the Behavior subscale
  3. bThe 22nd item, measuring nocturnal enuresis, was excluded because nocturnal enuresis is developmentally appropriate for 2-year-olds