All factors examined including age, sex, provoking factors, severity of headache, number of attacks at first visit, history of other primary headache and presence of reversible cerebral vasoconstriction syndrome were not associated with recurrence of PSOH.
Reliable, systematic and extensive data on symptoms, age of onset, attack frequencies and duration, relevant comorbidity, specific provoking factors including different hormonal factors in females, and effect and use of medication, both abortive and prophylactic, were thereby obtained.
No statistically significant association with the A-allele rs1835740 was found for any of the parameters that were studied: symptoms, comorbidity, provoking factors or the effect and use of different medical treatment.
Obesity-related IR depends on provoking factors from either the immune system or the brain.
There were some differences in the definitions of provoking factors in the three included cohorts.
This so the experts could judge the asthma care provided two years before asthma exacerbation taking asthma severity, asthmatic recurrences and provoking factors into account.
Definitions of provoking factors varied somewhat between the three cohorts, but in spite of this, the proportion of provoked VTE events was approximately 50% in all studies, which is in accordance with previous population-based studies.
The questionnaire included 58 items for history including precise description of pain, provoking factors, duration, evolution, intensity, quality, modification with position, ancillary symptoms and open text to describe the chest pain as well as precise localisation on an anatomical map.
It is possible that corrosion and ion release at the trunnion may be a provoking factor.
In most cases (n = 52, 72 %), we did not find any provoking factor for the occurring seizures in children with known epilepsy.
