Table 3.
Comparison of the preterm-infants group and the full-term-infants group using the CBISQ
| 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* | |
*P value < 0.05. +P value < 0.10.
#These questions were evaluated by severity, and scored from 1 to 4.