Group A

n = 25

Group B

n = 25

Group C

n = 25

P-value

A vs. B

A vs. C

B vs. C

No. of meperedine doses in 24 hr.

2.40 ± 0.50

1.11 ± 0.69

0.98 ± 0.58

<0.001*

<0.001*

0.099