Table 3.

Baseline characteristics and polysomnographic characteristics of the pediatric patients according to their group.

Variable	Control group 1 (children w/o CHF) (n = 10)	CHF children (n = 10)	p
Male/females	4/6	5/5	0.67
Age (year)	3.7 ± 2	3.6 ± 2.1	0.96
Height (cm)	82 ± 12	81.2 ± 14.2	0.97
Weight (kg)	24.7 ± 8.8	16.4 ± 7.6	0.50
Total sleep time (min)	373 ± 16	195 ± 49	0.001
Sleep efficiency (%)	72.3 ± 2.4	65.6 ± 6	0.37
Arousal index (no./h)	9.4 ± 1.3	9.2 ± 2.5	0.96
Stage 1–2 (% of total sleepperiod time)	60.9 ± 5.2	58.5 ± 10.3	0.81
Stage 3–4 (% of total sleepperiod time)	20.4 ± 5.1	20.3 ± 10.6	0.99
REM sleep (%)	18.2 ± 2.1	20.3 ± 6.5	0.70
Prevalence of CSA-CSR (%)	0	0	N/A
Respiratory rate	26.9 ± 3	55.1 ± 6.7	0.0012
Heart rate	97.6 ± 6.9	127.6 ± 8.7	0.017

Data presented as mean ± SEM.

REM, rapid eye movement; CSA-CSR, central sleep apnea-Cheyne–Stokes respiration.