Which of the following is an inflammatory marker drawn for assessment in rheumatoid arthritis?

C-reactive protein (CRP) is indeed an inflammatory marker that is commonly drawn to assess inflammation in conditions such as rheumatoid arthritis. CRP is produced by the liver in response to inflammation, and its levels rise in the presence of inflammatory stimuli, making it a valuable tool for evaluating disease activity and monitoring the response to therapy in rheumatoid arthritis.

In rheumatoid arthritis, elevated levels of CRP can indicate an active inflammatory process, helping clinicians to assess the severity and progression of the disease. Monitoring CRP levels over time can also provide insights into how well treatments are working, guiding adjustments in therapy as needed.

Other options do not serve as inflammatory markers for rheumatoid arthritis. Hemoglobin A1c is used to monitor long-term glucose control in diabetes, prothrombin time assesses coagulation status, and sodium levels are related to fluid and electrolyte balance rather than inflammation. Therefore, these alternatives do not provide relevant information for evaluating inflammatory activity in rheumatoid arthritis.