Table 2. Mean and standard deviation variable of postoperative pain and operative time of three techniques

	Diathermy tonsillectomy (mean±SD)	Coblation tonsillectomy (mean±SD)	Harmonic scalpel tonsillectomy (mean±SD)	p-value for ANOVA analysis
Operation time (min)	26.16±4.50	23.48±4.14	27±3.46	0.007*
VAS 1 day	4.84±1.30	4.42±1.59	4.12±2.03	0.203
VAS 1 week	3.61±0.91	2.84±1.86	2.65±1.69	0.015*
VAS 2 weeks	2.53±0.84	1.58±0.67	1.29±0.47	<0.001*
VAS 4 weeks	1.22±0.42	1.03±0.18	1.00±0	0.008*

p<0.05 statistically significant.
VAS: visual analogue scale, SD: standard deviation.