@ambershe and @sammiesarah - my first onset of PMR happened when I was 64. Here's some information from the linked article below.

"Polymyalgia rheumatica is seen mainly in people of north European ancestry, although it can occur in any ethnic group. It is almost never seen in people under the age of 50, and its prevalence increases with increasing age. The average age of onset is just over 70, and 75% of patients are women. The incidence of the disease in patients over 50 is about 100 per 100 000."

National Institutes of Health - Polymyalgia rheumatica
-- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2287267/

I've had 2 onsets of PMR which is currently in remission. What I've learned about tapering off of prednisone is that each of us are different in how we are affected and tapering slow worked best for me. The first occurrence took me 3 years to taper off. The last six months of those 3 years was going between 1 mg and 1/2 mg dosage. The second time around I was able to taper off more quickly - 1 and 1/2 years but the last six months or so was going from 5 mg to 2-1/2 mg to 1 mg and then off. I would work with your rheumatologist or doctor on a tapering schedule that works for you.