The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Table 3 Comparison of headache frequency and index before and after treatment within the study group

From: The efficacy of repetitive transcranial magnetic stimulation in treating patients with chronic daily headache

	Study group
	Headache index		Headache frequency
	Pre-treatment	Post treatment	Pre-treatment	Post treatment
Mean ± S.D	58.0 ± 22.891	3.06 ± 2.999	23.50 ± 6.782	3.19 ± 1.328
Range	15–90	0–10	15–30	1–5
P value	< 0.001*		< 0.001*

SD standard deviation
^*Highly significant

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