GMFCS

Total Stress Index by PSI/SF

p-value

Low/Standard

High

<94

≥94

N

%

N

%

Mild impairment

10

62.5

6

37.5

0.157

Moderate impairment

8

57.1

6

42.9

0.45

Severe impairment

40

64.5

22

35.5

0.001