Table 4.

Comparison of the headache severity (VAS; mean±SD)

	Group GON (n=53)	Group PGON (n=25)	p
Before block	8.26±1.32	8.08±0.90	0.476
Week 1	5.44±2.74*	5.20±2.82*	0.718
Week 2	5.06±3.21*	5.32±2.93*	0.733
Week 3	5.24±2.87*	5.20±2.48*	0.941
Week 4	4.75±2.96*	4.16±2.77*	0.392
2nd month	5.68±2.52*	6.18±1.08*	0.228
3rd month	5.16±2.64*	5.96±1.20*	0.077

^*p<0.05, when compared with the value before the block; p>0.05, when groups were compared.

VAS: visual analogue scale; GON: greater occipital nerve block; PGON: prophylaxis and greater occipital nerve block SD: standard deviation.