RESUMO
Purpose: Osteoarthritis of the knee (knee OA) is the most prevalent form of OA, frequently leading to significant pain and an overall reduction in quality of life. The available options for managing pain, associated with knee OA, are well documented. They include various oral analgesic medications (for example, NASIDs and opioids), intraarticular agents, notably, hyaluronic acid and corticosteroids, and where pharmacological and lifestyle options have been exhausted, orthopedic surgery, including total knee replacement (TKR). The treatment option(s) a patient may receive, in which order and at what time point, post-diagnosis may vary significantly between healthcare centers. The current study focuses specifically on knee OA in Germany, aiming to determine the epidemiology, patient characteristics and treatment schemes for the management of pain associated with knee OA. Method(s): A non-interventional, retrospective health claims data analysis was performed with an anonymized, age- and sex-representative sample of the Institute for Applied Health Research Berlin GmbH (InGef) database. The database that was used for this study includes approximately 4.8 million persons from approx. 60 statutory health insurances (SHI). Patients >=18 years of age were analyzed cross-sectionally for each year 2015-2020. Using ICD-10 and ATC codes, newly diagnosed patients in 2015 were also analyzed longitudinally until end of 2020. Result(s): The average period prevalence of knee OA was 7.34%, with a slight increase during the years 2015-2020. Incidence ranged from 1.71% of patients in 2015 to 1.46% of patients in 2020. Females and patients aged >=66 years had both a higher prevalence and incidence proportion compared to males and younger persons. Approximately 62% of newly diagnosed patients in 2015 received medical treatment during follow-up, most of whom were prescribed non-opioid analgesics;WHO I category (96.84%), followed by WHO II (2.45%) and WHO III (0.71%), as first line treatment. This analysis could not account for the use of any over the counter medications, or medicines prescribed in hospital, prior to, or after diagnosis. As many as 16.58% of newly diagnosed patients had surgery within 5 years. Knee replacement was the most common type of surgery with rising prevalence. The number of patients in whom surgery was performed decreased slightly from 5,38% to 4,03% during the study years considered (Figure 1);the decrease in 2020 may, in-part, be a reflection of the COVID-19 pandemic and the knock-on impact on healthcare systems. Of the 8,318 surgical patients, 2,101 patients (25.26%) had no record of having received any prescription pharmacological treatment prior to first surgery. The median time from first diagnosis until surgery in newly diagnosed patients was 346 days for any surgery, and 564 days for knee replacement. [Formula presented] Conclusion(s): With a stable incidence and a growing population, the number of patients with knee OA in Germany is slowly rising. In parallel, there is an slight decrease in total knee surgeries occurring each year with an increasing proportion of TKRs. Time until first surgery, in general, and TKR in newly diagnosed patients is relatively short, compared to other countries, with some patients having no record of having received any prescription medication prior to first surgery. Other treatment options such as opioids and intraarticular agents, appear to play a relatively minor role, in newly diagnosed patients, in current practice in Germany.Copyright © 2023