Table 1

Symptoms and symptom categories included in the study

Symptom as described in diary	Shortened name	Category
Sensation of dizziness or vertigo	Vertigo	SMF target—core
Nausea	Nausea	SMF target—core
Tinnitus/sensation of head ringing	Head ringing	SMF target—core
Seeing light spots or light flashes	Magnetophosphenes	SMF target—core
Metallic taste	Metallic taste	SMF target—core
Headache	Headache	SMF target
Tiredness or sleepiness	Tiredness	SMF target
Concentration problems	Concentration problems	SMF target
Vomiting	Vomiting	SMF target
Feeling of instability when standing, walking or moving	Instability	SMF target
Feeling lightheaded or weightless	Lightheadedness	SMF target
Blurred or double vision	Blurred vision	SMF target
A strange smell sensation	Strange smell	SMF target
Tingling sensation in the body	Tingling	SGF target
Involuntary muscle contractions	Muscle contractions	SGF target
Seeing black spots or having a temporary loss of vision	Black spots	A priori unrelated
Itchy, watery or red eyes	Irritated eyes	A priori unrelated
Sensation of glowing, burning or irritated skin	Irritated skin	A priori unrelated
Suddenly feeling warm or hot, hot flashes	Hot flashes	A priori unrelated
Earache	Earache	A priori unrelated
Palpitation	Palpitation	A priori unrelated