Prevalence of knee arthroplasty in the state of São Paulo between 2003 and 2010

Abstract

CONTEXT AND OBJECTIVE: The volume of knee arthroplasty procedures has increased over the last decade. The aim of this study was to estimate the frequency of these procedures performed within the public healthcare system of the state of São Paulo between 2003 and 2010. DESIGN AND SETTING: Cross-sectional study conducted in the state of São Paulo by researchers at Hospital do Servidor Público do Estado de São Paulo. METHODS: A sample of 10,952 patients (7,891 females and 3,061 males) who underwent primary total knee arthroplasty (TKA) and revision of total knee arthroplasty (RTKA) in the state of São Paulo between 2003 and 2010 was evaluated. The patients were cataloged using the public healthcare service's TABNET software. All of the patients presented primary osteoarthritis of the knee. The variables of gender, number of primary TKA procedures and number of RTKA procedures were evaluated. RESULTS: A total of 10,952 TKA procedures were performed (annual average of 1369), of which 9,271 (85%) were TKA and 1,681 (15%), RTKA. Of the TKA procedures, 72% were carried out on females (P < 0.0001), while 70% of the RTKA procedures were on females (P < 0.0001). The average ratio of TKA to RTKA was 5.5:1 (P < 0.0001); the ratios in 2003 and 2010 were 9.0:1 and 4.4:1 (P < 0.0001), respectively. CONCLUSION: The number and frequency of TKA and RTKA procedures increased in the state of São Paulo between 2003 and 2010. This increase was relatively greater in RTKA than in TKA and was predominantly in female patients. Over the last few decades, the rate of increase in the number of elderly people has outstripped the birthrate, 3 and there has been an expansion in the absolute numbers of cases of injury due to OA of the knee. 4 One of the therapeutic options for advanced symptomatic OA is total knee arthroplasty (TKA), which has shown a long-term success rate of 85% for relieving pain and improving function. [4][5][6][7][8][9][10] With the growth of primary TKA in absolute terms, it is reckoned that the frequency of revision TKA (RTKA) surgery will also increase. RESUMO 11The growth rate of TKA surgery has tended to track the progressive aging of the population and, moreover, the recommendations relating to the operative procedure have been extended to bring in patients who, increasingly, are younger and more active. 12,13 On the other hand, obesity continues to increase and can be considered to be a risk factor for TKA and for complications after TKA. 9,11 The cost of the prosthetic implants is one of the main expenses relating to the charge of knee surgery procedures, and the average price for prosthetic knee implants continues to follow the upward trend seen over the last decade. 11,14The increasing prevalence of RTKA surgery is related to sev- OBJECTIVEThe aim of this study was to estimate the frequency of knee Patients who underwent TKA and/or RTKA were assessed.All of these patients were registered in the TABNET software.Partial arthroplasty procedures (unicompartmental and patellofemoral) were excluded. Statistical...

Are joint replacement registries associated with burden of revision changes? A real-world panel data regression analysis

“…Online supplemental figure 1 illustrates the selection process. Online supplemental tables 2 and 3 describe the excluded registry and non-registry periods reports 3 9 10 19–29 Tables 1 and 2. present the included non-registry and registry periods data, respectively, after eligibility check.…”

From screening-driven medicine to symptom-driven medicine

“…9 The constant decline in age-adjusted mortality rates for all causes including chronic diseases, combined with the increasing size of the elderly population, is bringing up a new agenda for medical and public health research. 10 This agenda relates not only to avoidance of lethal diseases, but also to reduction of discomfort and painful conditions.…”

Comments: “Evolution and projection of knee arthroplasty from 2003 to 2030 in the state of São Paulo”

“…The aging of the Brazilian population, as a result of increased life expectancy, contributes to the increase of the arthroplasties at a national level. [1][2][3] Several studies have demonstrated that this increase reflects a worldwide trend. Other places, such as the United Kingdom and Australia, saw an increase in the number of arthroplasties during the same period, even though life expectancy there is greater than in Brasil.…”

“…Other places, such as the United Kingdom and Australia, saw an increase in the number of arthroplasties during the same period, even though life expectancy there is greater than in Brasil. [2][3][4][5] Over 76 years, from 1940 to 2016, the life expectancy of the Brazilians at birth increased in more than 30 years and today is 75.8 years, an increase of 3 months and 11 days compared to 2015, according to the Brazilian Institute of Geography and Statistics (IBGE). Data from the 2016 Mortality Table showed that, on average, women live longer than men.…”