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Table 3 Co-occurrence of non-headache symptoms during all three phases of migraine

From: Tracking the evolution of non-headache symptoms through the migraine attack

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

  1. Abbreviations: CI Confidence interval
  2. *Fleiss’ kappa coefficients with 95% CIs. Kappa value > 0.3 (fair-good agreement) with a p <  0.05 was considered significant