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Updated: Feb 16, 2026

Knee Arthrocentesis in Adults
Published on: February 25, 2022
Direct cost of medical care in patients with gonarthrosis
Enrique Villarreal-Ríos1, Margarita Cedillo-García2, Emma Rosa Vargas-Daza3
1Unidad de Investigación Epidemiológica y en Servicios de Salud Querétaro, Instituto Mexicano del Seguro Social, Querétaro, Querétaro de Arteaga, México; Escuela de Medicina, División de Ciencias de la Salud, Universidad del Valle de México Campus Querétaro, Querétaro, Querétaro de Arteaga, México.
Insights
The average annual cost of medical care for gonarthrosis (osteoarthritis of the knee) is relatively low per patient. However, due to high prevalence, the overall economic burden on health services is significant.
Area of Science:
- Orthopedics
- Health Economics
- Public Health
Background:
- Gonarthrosis, or osteoarthritis of the knee, is a prevalent condition affecting individuals over 40.
- Understanding the economic impact of gonarthrosis is crucial for healthcare resource allocation.
Purpose of the Study:
- To determine the overall cost of medical care for patients diagnosed with gonarthrosis.
- To analyze the economic burden of gonarthrosis in relation to its prevalence.
Main Methods:
- A cost study was conducted on patients over 40 diagnosed with gonarthrosis using the Kellgren and Lawrence radiological classification.
- Average annual costs were estimated by summing unit costs and average service utilization (family medicine, imaging, physical therapy, surgery, etc.).
- Three cost scenarios (low, intermediate, high) were projected.
Main Results:
- Grade 2 gonarthrosis was the most common diagnosis (39.7%).
- The estimated annual cost per patient ranged from €86.73 (low scenario) to €132.60 (high scenario), with an intermediate scenario cost of €108.87.
- For a population of over 10.9 million gonarthrosis patients, the total annual cost was estimated at over €1.19 billion, representing 4.48% of total health expenditure.
Conclusions:
- While the average annual cost per patient with gonarthrosis is modest, its high prevalence translates into a substantial economic challenge for healthcare systems.
- The findings highlight the need for effective management strategies to mitigate the financial impact of gonarthrosis.
Objective:
To determine the cost of medical care in patients with gonarthrosis.
Material And Methods:
Cost study in patients over 40 years of age with gonarthrosis, diagnosed according to the radiological classification of Kellgren and Lawrence. The average annual cost (euros) was estimated taking the unit cost plus average use of services such as family medicine, imaging, laboratory, electrodiagnosis, orthopedics, hospitalization, physical therapy, surgery, nutrition, preoperative assessment and medication. Projections based on assumptions were made for three scenarios.
Results:
Grade 2 gonarthrosis predominated at 39.7% (95% confidence interval, 33.8 - 45.6). The annual cost of care for a patient with gonarthrosis was €108.87 in the intermediate scenario, €86.73 in the lower cost scenario and €132.60 in the higher cost scenario. For a population of 119,530,753 inhabitants, with 10,937,064 gonarthrosis patients, the annual cost in the intermediate scenario was €1,190,685,273 and represented 4.48% of the health expenditure.
Conclusion:
The average annual cost of gonarthrosis is relatively low, but when related to prevalence and prevalence trends, it can become a serious problem for health services.
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