Table 3.

Co-occurrence of non-headache symptoms during all three phases of migraine

Non-headache symptoms	k value	p value*	C.I. 95%
Nausea	0.007	0.861	0.004–0.009
Difficulty in concentration	0.025	0.508	0.028–0.023
Photophobia	0.034	0.384	0.031–0.036
Speech difficulty	0.038	<  0.001	0.197–0.202
Fatigue	0.051	0.182	0.049–0.054
Irritability	0.060	0.118	0.058–0.063
Phonophobia	0.086	0.025	0.084–0.089
Food aversion	0.113	0.003	0.110–0.115
Frequent urination	0.135	<  0.001	0.133–0.137
Mood disturbance	0.215	<  0.001	0.212–0.217
Yawning	0.228	<  0.001	0.226–0.230
Food craving	0.246	<  0.001	0.243–0.248
Lethargy	0.247	<  0.001	0.244–0.249
Thirst	0.323	<  0.001	0.321–0.326
Neck stiffness	0.396	<  0.001	0.393–0.398
Abdominal pain	0.581	<  0.001	0.579–0.584

Abbreviations: CI Confidence interval

^*Fleiss’ kappa coefficients with 95% CIs. Kappa value > 0.3 (fair-good agreement) with a p <  0.05 was considered significant