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Table 2 Results of F-tests for individual fixed-effects terms using Satterthwaite approximation for degrees of freedom

From: Subdiagnosis, but not presence of vestibular symptoms, predicts balance impairment in migraine patients – a cross sectional study

Fixed effect

Sum Squares

df (num., den.)

F value

P value

Diagnosis

174.5

3, 218.35

3.1426

0.026

Surface

10,813.4

1, 206.91

584.3510

<  0.001

Eyes

4402.0

1, 225.33

237.8827

<  0.001

Vestibular Symptoms

46.4

1, 206.25

2.5078

0.11

Diagnosis:Surface

234.6

3, 206.91

4.2255

0.006

Diagnosis:Eyes

74.8

3, 234.80

1.3475

0.25

Eyes:Vestibular Symptoms

37.3

1, 262.60

2.0182

0.15

Diagnosis:Surface:Eyes

90.0

230.05

1.6218

0.18

  1. Significant p-values are marked by boldface. The best-fitting model, including random-effects terms, had an R2 of 0.84