Which symptom is most commonly assessed in a client with rheumatoid arthritis?

Joint stiffness is a hallmark symptom commonly assessed in clients with rheumatoid arthritis. This condition is characterized by inflammation in the joints, leading to pain and swelling. A significant feature of rheumatoid arthritis is morning stiffness, which often lasts for more than 30 minutes and can improve with movement. This stiffness results from the accumulation of inflammatory mediators in the joint spaces, causing discomfort and restricted motion.

While fatigue, swelling of the extremities, and weight gain can occur in rheumatoid arthritis, they are not as universally characteristic or defining as joint stiffness. Fatigue can be a common experience due to systemic inflammation, but it's not specific to rheumatoid arthritis alone. Swelling in the extremities may be present due to inflammation but varies in severity among individuals, while weight gain can be related to decreased mobility or other factors, but it is not a direct symptom of the disease itself. Therefore, joint stiffness stands out as the most prominent and specific symptom when assessing for rheumatoid arthritis.