Table 4 Slopes fitted in the ordinal regression, their t-values, and false positive probabilities

Fatigue

\({S}_{1}\)= -0.52

T(5592)= -9.9

< 0.001

Flu-like symptoms

\({S}_{2}\)= -0.362

T(5592)= -7.1

< 0.001

Pain at the injection site

\({S}_{3}\)= -0.342

T(5592)= -6.5

< 0.001

Known tension-type headache (triggering an attack within 24 h)

\({S}_{4}\)= -0.462

T(5592)= -5.8

< 0.01

Fever

\({S}_{5}\)= -0.19

T(5592)= -3.2

< 0.01

Dizziness/balance problems

\({S}_{6}\)= -0.22

T(5592)=-2.8

0.01

Known migraine (triggering an attack within 24 h)

\({S}_{7}\)= -0.26

T(5592)=-2.6

0.01

Circulatory weakness(dizzy/blackout)

\({S}_{8}\)= -0.11

T(5592)=-1.2

0.23

Nausea, vomiting

\({S}_{9}\)= -0.09

T(5592)=-1.0

0.31

Diarrhoea

\({S}_{10}\)= 0.04

T(5592) = 0.4

0.68

Redness

\({S}_{11}\)= 0.02

T(5592) = 0.2

0.83

Hematoma

\({S}_{12}\)= >-0.01

T(5592)<-0.02

> 0.98