<s>[INST] What’s the difference between osteoarthritis (OA) and rheumatoid arthritis (RA)?  [/INST] When you hear “arthritis,” you’re probably thinking of osteoarthritis (OA), which develops over time due to wear and tear on the body’s joints. “We suffer more from osteoarthritis as we get older,” says Peter Bonafede, M.D., a Providence rheumatologist. Rheumatoid arthritis (RA) is a chronic, autoimmune disease that causes inflammation in and around the joints, damaging them over time. RA affects more than twice as many women than men and typically occurs between ages 30 to 60.  Source: Providence. Link: https://blog.providence.org/blog/5-arthritis-questions-answered-2. Field: Rheumatology. Disease: Arthritis </s>