Knee Pain in Diabetes May Disrupt Blood Sugar Control
New research suggests osteoarthritis pain may interfere with achieving glycemic targets in type 2 diabetes
Moderate to severe knee osteoarthritis pain may reduce the likelihood of achieving glycemic control in patients with type 2 diabetes, highlighting pain management as a potentially important component of diabetes care.
Study Details
Knee osteoarthritis (OA) and type 2 diabetes frequently coexist, particularly in older adults. While both conditions independently affect quality of life, this study explored whether OA-related pain could also interfere with diabetes management.
Researchers conducted a cross-sectional analysis of 351 individuals with type 2 diabetes across three academic centers in Canada. The average participant age was 66 years, and about 28.5% met criteria for knee osteoarthritis. Glycemic control was defined as an A1c level of 7% or lower, achieved by 43.9% of participants.
The goal was to understand whether the presence and severity of knee pain influenced blood sugar control.
Methodology
Participants completed structured questionnaires capturing demographics, medical history, and joint symptoms. Researchers analyzed associations between knee osteoarthritis and glycemic control while adjusting for key confounders such as age, gender, education level, and body mass index.
Two analyses were performed. First, the presence of knee osteoarthritis was evaluated broadly. Second, the focus shifted to individuals with more significant pain, defined as a score greater than 20 on a 0 to 100 scale, to assess whether pain severity played a role.
Key Findings
Patients with knee osteoarthritis were less likely to achieve target A1c levels compared to those without OA
The association was stronger in patients with higher pain levels
Moderate to severe pain showed a statistically significant reduction in likelihood of glycemic control (odds ratio ~0.58)
Mild or general OA presence showed a similar trend but did not reach statistical significance
Findings suggest a threshold effect where pain severity becomes clinically meaningful
Implications for Practice
For patients, this study reinforces that joint pain is not just a mobility issue but may also impact metabolic health. Reduced physical activity due to pain could limit glucose utilization, contributing to poorer glycemic outcomes.
For healthcare providers, the findings suggest a need for integrated care approaches:
Pain assessment should be routine in patients with type 2 diabetes
Mobility limitations may signal risk for worsening glycemic control
Treating osteoarthritis proactively through physical therapy, weight management, or medications may indirectly improve diabetes outcomes
Encouraging safe movement strategies could help maintain activity levels despite joint pain
Importantly, this study is exploratory due to its cross-sectional design, meaning causation cannot be confirmed. However, it provides a strong signal that pain management may be an under-recognized lever in diabetes care.