Table 1.

Comparison of demographic data and characteristics of headache.

	Group GON (n=53)		Group PGON (n=25)
Age (years) (mean±SD)	37.83±8.73		40.08±9.74
Side of pain (right/left/bilateral) (n/%)	18/14/21	34%/26.4%/39.6%	11/5/9	44%/20%/36%
Gender	49/4	92.5%/7.5%	19/6	76%/24%
Female/male (n/%)

p>0.05. GON: greater occipital nerve block; PGON: prophylaxis and greater occipital nerve block; SD: standard deviation.