Table 2 Changes in resistive index and perfusion index in both the age groups, at diagnosis, 3 months and 6 months post-intervention

Resistive index

Group A

 Mean RI

0.80

0.73

0.71

 Decrease after intervention

–

0.07

0.02

 Significance

–

Significant

Significant

 P value

< 0.001

< 0.001

Group B

 Mean RI

0.78

0.73

0.70

 Decrease after intervention

–

0.05

0.03

 Significance

–

Significant

Significant

 P value

< 0.001

< 0.001

Perfusion index

Group A

 Mean PI

43.2

46.6

48.0

 Increase after intervention

–

3.4

1.4

 Significance

–

Significant

Not significant

 P value

< 0.001

> 0.05

Group B

 Mean PI

44.15

49.44

49.38

 Increase after intervention

–

5.29

− 0.06

 Significance

–

Significant

Not significant

 P value

< 0.001

> 0.05