Table 3

	Group				X² Test	p-value
	Study (n=30)		Control (n=30)
	No.	%	No.	%
Start:
None	9	30.0	2	6.7
Day 1	14	46.7	16	53.3	5.90	0.052
Day 2+	7	23.3	12	40.0
End:
None	9	30.0	2	6.7
Day 1	12	40.0	1	3.3	26.81	<0.001*
Day 2-5	7	23.3	9	30.0
Follow-up	2	6.7	18	60.0
Duration (hours):
Range	0.0-168.0		0.0-168.0
Mean±SD	22.1±34.0		111.2±55.9		U=27.75	<0.001*

(*) Statistically significant at p<0.05 (U) Mann-Whitney test

Table 3: Time of start, end, and duration of tension headache among patients in the study and control groups.