End tidal CO₂ (mm of Hg)

Group-A

n = 35

Group-B

n = 35

p value

Pre-operative

31.77 ± 2.39

31.91 ± 2.83

0.783^ns

15 minutes after induction of anaesthesia

30.69 ± 2.08

30.8 ± 2.49

0.842^ns

15 minutes after arrival at post-operative ward

31.03 ± 1.82

31.09 ± 1.62

0.885^ns