Evaluation of autonomic nervous system in children with spastic cerebral palsy: clinical and electophysiological study

Egyptian Rheumatology and Rehabilitation

Table 2 Comparison between the two studied groups according to HRV

	HRV	Cerebral palsy children (n = 40)	Healthy children (n = 20)	t	P
Supine	Mean HR(beat/min)
	Min.–max.	76.0–136.0	78.0–107.0	0.854	0.397
	Mean ± SD	100.83 ± 15.28	98.15 ± 8.93
	Median	103.0	101.50
	Mean RRI (s)
	Min.–max.	0.44–0.78	0.56–0.76	0.448	0.656
	Mean ± SD	0.60 ± 0.10	0.61 ± 0.06
	Median	0.58	0.59
90°head up	Mean HR(beat/min)
	Min.–max	76.0–166.0	80.0–111.0	3.102^*	0.003^*
	Mean ± SD	115.18 ± 19.77	103.80 ± 8.58
	Median	118.0	107.0
	Mean RRI (s)
	Min.–max	0.36–0.79	0.53–0.74	2.018^*	0.048^*
	Mean ± SD	0.54 ± 0.10	0.58 ± 0.06
	Median	0.51	0.56

P P value for comparing between the two groups, HRV heart rate variability, RRI R-R interval, HR heart rate
t Student’s t test
*Statistically significant at P ≤ 0.05