“…The entry survey collects information on HRQoL, frequency of symptoms (never/once/recurrent/permanent), age, disease duration (years since MS diagnosis), MS form, use of disease-modifying treatment (DMT), health professionals visited in the previous year, confirmed MS diagnosis in parents, siblings or offspring, mobility (Ferchichi and van der Maas, 2015;van der Maas, 2017), lifestyle factors, and socioeconomic status. As Expanded Disability Status Scale (EDSS) was rarely reported, a proxy measure was derived from available mobility data (Appendix) (Ferchichi and van der Maas, 2015;van der Maas, 2017). The symptoms were categorized as follows: problems with balance, bladder, and bowel, dizziness, depression, dysarthria, dysphagia, epileptic seizures, fatigue, gait problems, memory problems, pain, paralysis, paresthesia, sexual dysfunction, spasticity, tics, tremor, visual problems, and general weakness.…”