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Table 1 Factor loadings on the four factors in 324 participants

From: Headache symptoms from migraine patients with and without aura through structure-validated self-reports

  Items Factor
1 2 3 4
Somatic/Aura Symptoms I felt my vision blurred when headache attacked. .71 .10 .15 .10
There were black spots in my vision when headache attacked. .70 .16 .08 .12
I talked less frequently when headache attacked. .68 .15 .10 .00
I lost physical balance control when headache attacked. .64 .22 .11 .20
I lost consciousness when headache attacked. .63 .01 .24 −.16
I was sensitive to strong sound when headache attacked. .49 .22 .11 .17
I felt abdominal pains when headache attacked. .49 .23 .06 .24
Gastrointestinal and Autonomic Symptoms I had a poor appetite when headache attacked. .10 .82 .05 .08
I looked pale when headache attacked. .24 .71 .26 −.01
I felt weak when headache attacked. .16 .60 .18 .31
I felt nausea when headache attacked. .27 .57 .18 .18
I was sensitive to strong light when headache attacked. .21 .47 .31 .20
I sweated a lot when headache attacked. .34 .41 .19 .19
Tightness and Location Features I felt that my head was hooped by a ribbon when headache attacked. .22 .16 .75 .05
I once felt that my head was hooped. .07 .13 .75 .14
I felt that my head was pressed by a big stone when headache attacked. .31 .09 .65 .21
I felt I was wearing a hat when headache attacked. .28 .26 .64 .08
My whole head was extremely painful when headache attacked. −.03 .15 .57 .24
Headache location migrated during my headache period. .16 .09 .41 .10
I felt throbbing over my head when headache attacked. .00 .24 .41 .39
My neck was also painful when headache attacked. .33 −.05 .41 .36
Prodromal/Aggravating Symptoms I felt fatigue for a period before headache attacked. .11 .16 .08 .78
I had difficulty in concentrating for a period before headache attacked. .19 .15 .08 .76
I yawned repetitively for a period before headache attacked. .23 .05 −.03 .72
I was often upset about my life or study/work. −.01 .10 .26 .56
I was easily irritated when headache attacked. .11 .10 .30 .55
Insomnia intensified my headache. −.08 .20 .36 .55
  1. Loadings higher than 0.40 are presented in bold for clarity