Table 3.

Phenotypic ICHD-3 criteria C and D for 2.1 episodic tension-type headache.

	All patients (n = 106)	No history of TTH (n = 76)	Prior history of TTH (n = 30)	Unadjusted p-value
Criterion C: Headache has at least two of the following four characteristics
Bilateral location	90 (84.9%)	64 (84.2%)	26 (86.7%)	0.986
Pressing or tightening	80 (75.5%)	58 (72.5%)	22 (73.3%)	0.943
Mild or moderate intensity	38 (35.8%)	28 (36.8%)	10 (33.3%)	0.909
Not aggravated by routine physical activity	70 (66.0%)	51 (67.1%)	19 (63.3%)	0.887
At least two:	90 (84.9%)	66 (86.8%)	24 (80.0%)	0.558
Criterion D: During the headache at least one of the following
No nausea or vomiting	91 (85.8%)	64 (84.2%)	27 (90.0%)	0.645
No more than one of photophobia or phonophobia	75 (70.8%)	57 (75.0%)	18 (60.0%)	0.196
Both of them	66 (62.3%)	50 (65.8%)	16 (53.3%)	0.332

ICHD-3: The International Classification of Headache Disorders, 3rd edition; TTH: tension-type headache.