The Egyptian Journal of Neurology, Psychiatry and Neurosurgery

Table 3 Correlation between the consumption of caffeine and mobile phone use versus the frequency of headache and the effect of headache on daily life

From: QEEG findings in adolescents complaining of headache

	Headache frequency	Effect on daily life
Spearman’s rho
Caffeine consumption
Correlation Coefficient	0.047	0.233
P value	0.753	0.081
n	47	57
Mobile phone usage
Correlation Coefficient	− 0.160	0.165
P value	0.282	0.220
n	47	57

n number

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