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Table 4 Headache duration (hours) according to accompanying symptoms

From: Phenotypic features of chronic migraine

Accompanying symptoms

 

Number of subjects (n)

Headache duration (hours)

P value

Nausea

Present

612

12 [4–24]

0.056

Absent

177

12 [3–24]

Vomiting

Present

302

19 [6–24]

<0.001

Absent

436

12 [3–24]

Phonophobia

Present

635

12 [4–24]

0.010

Absent

157

11 [4–24]

Photophobia

Present

560

12 [4–24]

0.003

Absent

227

10 [3–24]

Dizziness

Present

116

12 [6–24]

0.148

Absent

545

12 [4–24]

Vertigo

Present

92

12 [5–24]

0.826

Absent

549

12 [4–24]

Osmophobia

Present

127

12 [7–24]

0.219

Absent

111

12 [4–24]