Group A

n = 25

Group B

n = 25

Group C

n = 25

P-value

A vs. B

A vs. C

B vs. C

Duration of motor block (min)

184.20 ± 17.95

188.80 ± 23.29

183.40 ± 24.44

0.616

0.713

0.421

Duration of effective analgesia (min)

177.20 ± 20.37

207.40 ± 23.36

218.80 ± 23.64

<0.001*

<0.001*

0.227