Skip to main content

Table 2 Subjective and objective sleep problems of premature infants

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

Questionnaire

Objective sleep measure

r

P value

CBISQ

Criterion of sleep diary

0.757

0.011*

Nocturnal sleep duration

Nocturnal sleep duration

Number of night awakenings

Nocturnal awake time

0.632

0.002*

Numbers of night awakening

0.580

0.001*

Nocturnal sleep efficiency

−0.644

<0.001*

Daytime sleep duration

Daytime sleep duration

0.630

0.002*

Loud-noisy breathing

Daytime sleep duration

0.348

0.064+

CBISQ

Actigraphy criterion

  

Time spent with mouth breathing

Awakening time during sleep

0.514

0.042*

Nocturnal sleep efficiency

−0.255

0.013*

CBISQ

PSG criteria

 

Nocturnal sleep duration

Nocturnal sleep duration

0.545

0.002*

Number of night awakenings

Desaturation index

0.636

0.003*

Daytime sleep duration

AHI in sleep

0.767

0.075+

Awakening after sleep onset

0.350

0.080+

Time spent with mouth breathing

Obstructive apnea count

0.509

0.026*

Loud-noisy breathing

Arousal count

0.401

0.089+

Obstructive apnea count

0.535

0.018*

  1. *P value < 0.05. +P value < 0.10.
  2. AHI: Apnea-Hypopnea Index (events/hour); Desaturation index: desaturation events/hour; “Arousal count” means total number of arousal during sleep; “Obstructive apnea count” means total number of obstructive apnea during sleep.