Skip to main content

Table 3 Comparison of the preterm-infants group and the full-term-infants group using the CBISQ

From: Sleep and breathing in premature infants at 6 months post-natal age

CBISQ Sleep measure Preterm infants Full-term infants P value
Location of sleep Infant crib in a separate room 1.0% 0.0% -
Infant crib in parents’ room 33.0% 33.3% 0.965
In parents’ bed 64.9% 66.6% 0.828
Infant crib in room with sibling 1.0% 0.0% -
Preferred body position On his/her back 52.2% 51.0% 0.876
On his/her side 37.7% 31.4% 0.397
On his/her belly 10.1% 17.6% 0.193
Nocturnal sleep duration (minutes, mean ± SD) 544.87 ± 81.93 490.71 ± 134.48 0.027*
Nocturnal sleep-onset time# (mean ± SD) 2.61 ± 1.31 2.53 ± 1.02 0.782
Method of falling asleep While feeding 19.8% 23.1% 0.555
Being rocked 23.4% 21.5% 0.752
Being held 24.8% 23.1% 0.769
In bed alone 12.2% 12.3% 0.986
In bed near parent 19.8% 20.0% 0.969
Difficulty falling asleep# (mean ± SD) 2.47 ± 1.93 2.16 ± 1.71 0.494
Number of night awakenings# (mean ± SD) 2.28 ± 0.93 1.72 ± 0.67 0.014*
Daytime sleep duration (minutes, mean ± SD) 364.07 ± 152.1 271.67 ± 133.16 0.014*
Subjective consideration of sleep problems# (mean ± SD) 1.53 ± 0.69 1.21 ± 0.54 0.024*
Time spent with mouth breathing# (mean ± SD) 1.47 ± 0.57 1.20 ± 0.42 0.077+
Loud-noisy breathing# (mean ± SD) 1.88 ± 0.69 1.44 ± 0.51 0.010*
Time spent with crying during night# (mean ± SD) 1.64 ± 0.71 1.26 ± 0.45 0.003*
  1. *P value < 0.05. +P value < 0.10.
  2. #These questions were evaluated by severity, and scored from 1 to 4.