Table 4

	Group (with tension headache)				X2 Test	p-value
	Study		Control
	No.	%	No.	%
Day 1:
None	12	100.0	0	0.0
One	0	0.0	7	38.9	30.00	<0.001*
Multiple	0	0.0	11	61.1
Day 2:
None	5	100.0	0	0.0
One	0	0.0	7	30.4	28.00	<0.001*
Multiple	0	0.0	16	69.6
Day 3:
None	6	100.0	0	0.0
One	0	0.0	7	28.0	31.00	<0.001*
Multiple	0	0.0	18	72.0
Day 4:
None	1	100.0	0	0.0
One	0	0.0	6	27.3	23.00	<0.001*
Multiple	0	0.0	16	72.7
Day 5:
None	1	100.0	0	0.0
One	0	0.0	6	30.0	21.00	<0.001*
Multiple	0	0.0	14	70.0
Follow-up:
None	3	100.0	0	0.0
One	0	0.0	3	18.8	19.00	<0.001*
Multiple	0	0.0	13	81.3

(*) Statistically significant at p<0.05

Table 4: Symptoms associated with tension headache among patients in the study and control groups throughout follow-up.