@Caterpillar 

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Caterpillar

RRMS to secondary progressive MS

I was wondering at what age MS changes from relapsing/remitting to secondary progressive. I think that for the majority of MSers it is around 50 - or am I totally wrong and age does not play a role?
@hunterdog

That is a excellent question Caterpillar! I've been wondering the same; whereas I was just diagnosed! I'll also be turning 50 this year! It's been 3 months today since my initial MS attack! I got hit pretty hard (hospitalized)! Secondary progressive has been on my mind lately! Someone out there should have a better idea.......let's hope!

@Lugoues

DMDs have changed a lot of things when it comes to progression of our disease. Before DMDs 50% of people moved onto SPMS within 10 years of the initial onset, 90% within 25 years. Regardless, 40 seems to be the average age of progression and each year beyond this increases your risks quite a bit. Note: these numbers are estimates as most studies fluctuate with regard to how many years it takes.