Effect of Preoperative Nerve Block on Postthyroidectomy Headache and Cervical Pain: A Randomized Prospective Study

Table 3

Outcome in terms of VAS score.

Sl number		Group I	Group II	Group III	Significance ( value)
1	VAS at 12 hours: mean (median)
	Incision site	2.6 ± 1.8 (3.0)	3.3 ± 2.1 (3.0)	4.3 ± 2.1 (4.0)	0.019
	Nape of neck	1.0 ± 1.0 (1.0)	1.7 ± 2.1 (1.0)	2.6 ± 2.3 (2.0)	0.015^†
	Occipital headache	0.7 ± 0.9 (0.0)	1.2 ± 1.3 (1.0)	2.1 ± 1.7 (2.0)	0.003^‡
2	VAS at 24 hours: mean (median)
	Incision site	3.0 ± 1.5 (3.0)	3.4 ± 1.8 (3.0)	3.5 ± 1.8 (3.0)	0.510
	Nape of neck	1.0 ± 1.4 (0.0)	1.4 ± 1.4 (1.0)	2.1 ± 1.5 (2.0)	0.008^δ
	Occipital headache	0.8 ± 1.1 (0.0)	1.0 ± 1.5 (0.0)	1.4 ± 1.1 (1.0)	0.041

⁢ versus III, ; II versus III, ; and I versus II, ; versus III, ; II versus III, ; and I versus II .
⁢ versus III, ; II versus III, ; and I versus II, ; versus III, ; II versus III, ; and I versus II .
⁢ versus III, ; II versus III, ; and I versus II, .