If the patient population was divided into 2 subgroups (those with and those without relapses in the 2-year period prior to study entry), there was no effect on disability in patients without relapses, but in patients with relapses, the proportion with progression in disability at the end of the study was reduced from 70% (placebo) to 57% (Rebif 22 micrograms and 44 micrograms combined).
Kui uuritud patsiendid jaotati kahte alarühma (need, kellel 2- aastase perioodi kestel enne uuringusse arvamist oli esinenud ägenemisi ning need, kellel uuringueelse 2 aasta jooksul ägenemisi ei olnud), täheldati, et ravimil puudus toime puude süvenemisele nendel patsientidel, kellel enne uuringut haiguse ägenemisi ei olnud.