Table 3. The mean pairwise analysis (post hoc) for the 3 groups .

Dependent Variable	(I) Group	(J) Group	Mean Difference (I-J)	Std. error	p
VAS after 1 hour	Placebo	Bupivacaine	1.66	0.20	<0.001
		Acetazolamide	1.49	0.20	<0.001
VAS after 4 hours	Bupivacaine	Acetazolamide	0.77	0.33	0.023
	Placebo	Bupivacaine	1.94	0.33	<0.001
		Acetazolamide	2.71	0.33	<0.001
VAS after 8 hours	Placebo	Bupivacaine	1.52	0.27	<0.001
		Acetazolamide	1.70	0.27	<0.001
VAS after 12 hours	Bupivacaine	Acetazolamide	1.09	0.29	<0.001
	Placebo	Acetazolamide	0.92	0.29	0.003
VAS after 24 hours	Bupivacaine	Acetazolamide	1.23	0.38	0.002
	Placebo	Acetazolamide	1.32	0.38	<0.001