Evaluation of Malaria Microscopy Diagnostic Performance at the Public Health Center on the Border of Indonesia Timor-Leste.

ABSTRACT: Accurate diagnosis is a key strategy for controlling and preventing malaria. Regular evaluation of the performance of malaria microscopy diagnosis is essential to ensure its high quality. This study aims to assess the accuracy of malaria microscopy at selected public health facilities on the border of Indonesia and Timor-Leste. The design of this research is observational with a cross-sectional approach, conducted at five public health centers located on the Indonesia Timor-Leste border from July to September 2022. Stained slides were collected from patients with a fever (≥37°C). These stained slides were then examined for malaria diagnosis. The results revealed that all five public health centers showed perfect or nearly perfect agreement with the reference microscopist regarding malaria detection by microscopy (κ =0.9-1). To maintain the high quality of malaria microscopy diagnosis, it is imperative to conduct regular training, monitoring, and evaluation.

Sexual behavior and personal initiative to take the HIV test among men who have sex with men in Semarang, Indonesia.

The HIV test is an important strategy for HIV prevention and treatment, starting from screening individuals who are unaware of being infected with HIV and requiring antiretroviral therapy. Information about sexual behavior factors related to HIV testing initiatives among MSM in Indonesia is still limited. Previous studies only showed the correlation of various sexual behavior variables with the decision whether to obtain an HIV test or not; but did not learn whether the HIV testing was obtained due to personal initiative or invited by others. This research can be used as a reference for developing an HIV testing program based on sexual behavior variables. This research aims to study the sexual behavior factors related to the personal initiative on taking the HIV test among men who have sex with men (MSM). We used cross-sectional study among 300 MSM who had an HIV test. This research found that homosexual orientation was negative factor related to the personal initiative for obtaining an HIV test. Sexual behavior among MSM is correlated with the personal initiative to take HIV testing. Further investigation should emphasize among homosexuals because they do not have the initiative to take an HIV test.

Le test du VIH est une stratégie importante pour la prévention et le traitement du VIH, qui commence par le dépistage des personnes qui ignorent qu'elles sont infectées par le VIH et qui nécessitent un traitement antirétroviral. Les informations sur les facteurs de comportement sexuel liés aux initiatives de dépistage du VIH parmi les HSH en Indonésie sont encore limitées. Des études antérieures ont uniquement montré la corrélation entre diverses variables du comportement sexuel et la décision d'obtenir ou non un test de dépistage du VIH; mais n'a pas appris si le test du VIH avait été obtenu grâce à une initiative personnelle ou sur invitation d'autres personnes. Cette recherche peut servir de référence pour développer un programme de dépistage du VIH basé sur des variables de comportement sexuel. Cette recherche vise à étudier les facteurs de comportement sexuel liés à l'initiative personnelle de faire le test du VIH chez les hommes ayant des rapports sexuels avec des hommes (HSH). Nous avons utilisé une étude transversale auprès de 300 HSH ayant subi un test de dépistage du VIH. Cette recherche a révélé que l'orientation homosexuelle était un facteur négatif lié à l'initiative personnelle d'obtenir un test de dépistage du VIH. Le comportement sexuel des HSH est corrélé à l'initiative personnelle de se soumettre au test du VIH. Une enquête plus approfondie devrait être menée auprès des homosexuels car ils n'ont pas l'initiative de faire un test de dépistage du VIH.

Anti-SARS-CoV-2 antibody dynamics after primary vaccination with two-dose inactivated whole-virus vaccine, heterologous mRNA-1273 vaccine booster, and Omicron breakthrough infection in Indonesian health care workers.

BACKGROUND: Data on the dynamics and persistence of humoral immunity against SARS-CoV-2 after primary vaccination with two-dose inactivated vaccine (CoronaVac) are limited. This study evaluated the sequential effects of prior infection, heterologous boosting with mRNA-1273 (Moderna), and the occurrence of Omicron vaccine-breakthrough infection (VBI) thereafter. METHODS: We evaluated anti-spike IgG (Abbott) and neutralising (cPASS/GenScript) antibody (nAb) titers up to one year after mRNA-1273 boost in two-dose-CoronaVac-primed Indonesian healthcare workers (August 2021-August 2022). We used linear mixed modeling to estimate the rate of change in antibody levels, and logistic regression to examine associations between antibody levels and VBI. RESULTS: Of 138 participants, 52 (37.7%) had a prior infection and 78 (56.5%) received an mRNA-1273 booster. After two-dose CoronaVac, antibody titers had significantly declined within 180 days, irrespective of prior infection. After mRNA-1273 booster, anti-spike IgG (1.47% decline/day) and Omicron B.1.1.529/BA.2 nAbs declined between day 28-90, and IgG titers plateaued between day 90-360. During the BA.1/BA.2 wave (February-March 2022), 34.6% (27/78) of individuals experienced a VBI (median 181 days after mRNA-1273), although none developed severe illness. VBI was associated with low pre-VBI anti-spike IgG and B.1.1.529/BA.2 nAbs, which were restored post-VBI. CONCLUSIONS: mRNA-1273 booster after two-dose CoronaVac did not prevent BA.1/BA.2 VBI. Periodic vaccine boosters may be warranted against emerging SARS-CoV-2 variants.

Securing the rights and health of domestic workers: the importance of ratifying the ILO's C189.

This commentary highlights the critical importance of ratifying the International Labour Organization's (ILO) Domestic Workers Convention No. 189-2011 (C189) to secure the rights and health of domestic workers (DWs) worldwide, particularly in light of the World Health Organization's World Health Day 2024 theme 'My Health, My Right'. The ILO's C189 represents a significant advancement in labour rights, offering protection to a highly feminised sector where women make up 80% of the estimated 50-100 million DWs worldwide. The ILO's C189 aims to address the marginalisation and exploitation that DWs have historically faced by ensuring that they receive the same protections as other workers. This encompasses measures against abuse, harassment and violence, and the establishment of a secure and healthy working environment, as outlined in Article 13. The commentary emphasises the urgent need for the enactment of legal frameworks in countries such as Indonesia, where many of the approximately 10 million DWs encounter shocking abuses both within the country and abroad. The ratification of the C189 and the enactment of national laws, such as Indonesia's Draft Law on the Protection of Domestic Workers (RUU PPRT), are essential for the safeguarding of the rights and health of DWs. The commentary compares Indonesia with the Philippines, as the latter has been a signatory to the C189 since 2012 and has enacted its National Domestic Workers Act in 2013. The ratification of the C189, therefore, is imperative for igniting the protection and advancement of labour rights for DWs globally. This ILO's C189 represents a significant first step in addressing the long-standing and complex issues of marginalisation and exploitation prevalent in this predominantly female sector. It is also essential that the potential obstacles and concerns related to the ratification and implementation of the ILO's C189 are addressed collaboratively by stakeholders and not viewed as justifications for inaction.

Effect of honey and povidone-iodine on acute laceration wound healing: a pilot randomised controlled trial study.

OBJECTIVE: Acute laceration wound (ALW) is one of the most common injuries in Indonesia with potential significant morbidities. In rural areas, povidone-iodine and honey are commonly used as wound dressings. This study aimed to identify the effectiveness of honey compared to paraffin gauze and the commonly used povidone-iodine in improving ALW healing time. METHOD: This study was a single-blind, pilot randomised controlled trial (RCT) with three intervention groups (honey, povidone-iodine, and paraffin). The outcomes were wound healing time, slow healing, secondary healing, signs of infection, wound dehiscence, oedema, maceration, necrosis, exudate and cost. RESULTS: A total of 35 patients (male to female ratio: 4:1), with a mean age of 22.5 (range: 6-47) years, were included and randomised to treatment groups using predetermined randomisation according to wound location and wound dressing selection: honey group, n=12; povidone-iodine group, n=11; paraffin group, n=12 with one patient lost to follow-up. All groups achieved timely healing, with a mean healing time of 9.45±5.31 days and 11.09±5.14 days for the povidone-iodine and paraffin groups, respectively, and a median healing time of 10 (3-19) days for the honey group (p>0.05). More wounds in the honey group achieved healing in ≤10 days compared with the other groups. Both povidone-iodine and honey groups had fewer adverse events, with the latter having the lowest cost. CONCLUSION: In this study, honey was clinically effective in accelerating healing time with a lower cost compared to paraffin, and was comparable to povidone-iodine. Future RCTs with a larger sample size should be pursued to determine honey's role in ALW treatment.

Political economy analysis of health taxes (tobacco, alcohol drink and sugar-sweteened beverage): qualitative study of three provinces in Indonesia.

OBJECTIVE: Efforts to implement health tax policies to control the consumption of harmful commodities and enhance public health outcomes have garnered substantial recognition globally. However, their successful adoption remains a complex endeavour. This investigates the challenges and opportunities surrounding health tax implementation, with a particular focus on subnational government in Indonesia, where the decentralisation context of health tax remains understudied. DESIGN: Employing a qualitative methodology using a problem-driven political economy analysis approach. SETTING: We are collecting data from a total of 12 focus group discussions (FGDs) conducted between July and September 2022 in three provinces-Lampung, Special Region of/Daerah Istimewa Yogyakarta and Bali, each chosen to represent a specific commodity: tobacco, sugar-sweetened beverages (SSBs) and alcoholic beverages-we explore the multifaceted dynamics of health tax policies. PARTICIPANT: These FGDs involved a mean of 10 participants in each FGD, representing governmental institutions, non-governmental organisations and consumers. RESULTS: Our findings reveal that health tax policies have the potential to contribute significantly to public health. Consumers understand tobacco's health risks, and cultural factors influence both tobacco and alcohol consumption. For SSBs, the consumers lack awareness of long-term health risks is concerning. Finally, bureaucratic complexiting and decentralised government hinder implementation for all three commodities. CONCLUSION: Furthermore, this study underscores the importance of effective policy communication. It highlights the importance of earmarking health tax revenues for public health initiatives. It also reinforces the need to see health taxes as one intervention as part of a comprehensive public health approach including complementary non-fiscal measures like advertising restrictions and standardised packaging. Addressing these challenges is critical for realising the full potential of health tax policies.

Psychological Impact of Bladder Cancer: Insights from 219 Patients and Caregivers in Indonesia Using DASS-21 (2019-2023).

BACKGROUND Bladder cancer (BC) is a common disease worldwide. Low survival rates and high recurrence lead to the risk of mental disorders. This study analyzed 219 patients with bladder cancer using the Indonesian Version of the 21-item Depression, Anxiety, and Stress Scale (DASS-21) and related factors. MATERIAL AND METHODS This cross-sectional study included 219 patients diagnosed with bladder cancer during 2019-2023 in a referral hospital in Indonesia. Data were collected using a questionnaire that assessed the characteristics of the patients and a DASS-21 questionnaire. RESULTS Some patients and caregivers experienced depression, stress, and anxiety. The percentage of caregivers who experienced anxiety was higher than for patients (47.9% vs 45.7%). Statistical analysis showed that age, income, and marital status were associated with the incidence of depression (p=0.000, p=0.001, and p=0.000, respectively), anxiety (p=0.000, p=0.012, and p=0.001, respectively), and stress (p=0.000, p=0.007, and p=0.000, respectively). Routes of patient admission (p=0.043, respectively) and employment status (p=0.005, respectively) were associated with the incidence of depression in patients (p=0.043, respectively). Employment status was also associated with stress in patients (p=0.038, respectively). Statistical analysis of caregivers found that routes of patient admission and marital status were related to the incidence of depression among caregivers (p=0.036 and p=0.007, respectively). CONCLUSIONS Monitoring and providing support for patients and caregivers are needed to prevent poor prognosis due to psychological problems, including paying attention to sociodemographic factors.

What medical specialists want to stay in remote areas of Indonesia: Discrete choice experiments.

INTRODUCTION: The equitable distribution of medical specialists in Indonesia's remote areas remains a challenge. This study investigated the preferences of medical specialists regarding retention programs aimed at addressing this issue. METHODS: A Discrete Choice Experiment (DCE) was utilized to collect stated preferences from 341 medical specialist working in district general hospitals across 10 Indonesian provinces. The DCE retention questionnaire focused on eight key characteristics: location, medical facilities, net income, continuing professional development program, security, length of commitment, source of incentives, and caseload. RESULTS: The study found that the most influential factors for retention in remote areas were security guarantees from the local government (OR = 6.11), fully funded continuing professional development programs (OR = 2.84), and access to advanced medical facilities (OR = 2.35). CONCLUSION: The findings indicate that a comprehensive intervention package, with a particular emphasis on security provisions, is necessary to retain medical specialists in remote areas. Financial incentives are also recommended to improve retention. However, it is crucial to acknowledge that no single intervention will suffice, as the factors influencing specialist retention in remote areas of Indonesia are complex and multifaceted.

Towards understanding climate change impacts: monitoring the vegetation dynamics of terrestrial national parks in Indonesia.

Monitoring vegetation dynamics in terrestrial national parks (TNPs) is crucial for ensuring sustainable environmental management and mitigating the potential negative impacts of short- and long-term disturbances understanding the effect of climate change within natural and protected areas. This study aims to monitor the vegetation dynamics of TNPs in Indonesia by first categorizing them into the regions of Sumatra, Jawa, Kalimantan, Sulawesi, and Eastern Indonesia and then applying ready-to-use MODIS EVI time-series imageries (MOD13Q1) taken from 2000 to 2022 on the GEE cloud-computing platform. Specifically, this research investigates the greening and browning fraction trends using Sen's slope, considers seasonality by analyzing the maximum and minimum EVI values, and assesses anomalous years by comparing the annual time series and long-term median EVI value. The findings reveal significantly increasing greening trends in most TNPs, except Danau Sentarum, from 2000 to 2022. The seasonality analysis shows that most TNPs exhibit peak and trough greenness at the end of the rainy and dry seasons, respectively, as the vegetation response to precipitation increases and decreases. Anomalies in seasonality that is affected by climate change was detected in all of the regions. To increase TNPs resilience, suggested measures include active reforestation and implementation of Assisted Natural Regeneration, strengthen the enforcement of fundamental managerial task, and forest fire management.

Sea surface temperature and current-related parameters affecting local adaptation of scalloped spiny lobster population in Indonesia's archipelagic system.

The Scalloped Spiny lobster (Panulirus homarus, Linnaeus 1758) known as one of the commercially harvested Panilurid lobster. This species was distributed widely across continents. Indonesia, as one of the largest archipelagic systems in the world, was also distribution area of the Scalloped Spiny lobster. These facts have led to questions regarding spiny lobster harvest and culture management by considering population differentiation and habitat fragmentation on complex and distinct archipelagic islands. Our investigation was conducted using high-density SNPs datasets from several spiny lobsters harvested from five locations in Indonesia. We found strong differentiation among spiny lobster populations clustered into 3 sub-populations. Environment association analysis and Fst analysis revealed outlier loci significantly associated with Sea Surface Temperature variation and potentially correlated with Sea Current-related parameters. The evidence of a structured population of scalloped spiny lobsters in Indonesia can serve as a consideration in the management of spiny lobsters.

The Perceptions and Experiences of Older People Living in the Aftermath of Lombok Earthquakes, Indonesia: A Qualitative Study.

INTRODUCTION: Despite the growing knowledge of people's vulnerability following natural disasters, the perspective of older people has received limited attention. This study aimed to explore the perceptions and experiences of older people encountering the 2018 Lombok earthquakes. METHODS: This exploratory qualitative study involved 16 older people living in one of the villages most affected by the 2018 earthquakes in Lombok Island, Nusa Tenggara Barat, Indonesia. The data were collected in June 2019 using semi-structured interviews. Participants' responses were digitally recorded and transcribed verbatim for analysis. The data were analysed using qualitative content analysis managed in NVivo. RESULTS: From older people's perspectives, three themes were generated: surviving the disaster, dealing with life changes and navigating through challenges and hope. Each theme comprised two categories, which reflected the journey of older people from the early to the later phase of the disaster. CONCLUSIONS: Older people experienced critical conditions and difficulties both physically and mentally. They also experienced various emotional responses before accepting living situations following a disaster. Nurses should play a role in fulfilling the physical and mental health needs of older people in post-disaster conditions. IMPLICATIONS FOR PRACTICE: This study can inform nurses and other key stakeholders about the needs of older people during and after natural disasters. Nurses need to be equipped with the skills and abilities to identify and meet the needs of older people in difficult situations and with limited resources.

Microanalytical approaches on the silicification process of wood fossil from Jasinga, West Java, Indonesia.

Worldwide, silicified woods are found in many geological formations. Significantly, the organic materials of wood are no longer dominant; almost all wood fossils have been mineralized into inorganic silica materials. These unique geological processes must be understood to develop better understanding on organic material fossilization, particularly in the micron scale. Therefore, our aim was to characterize the composition of silicified wood using comprehensive microanalysis. The methods utilized were XRF, ICP-MS, XRD, FTIR, and FE-EPMA. Specimens are from Jasinga, West Java, Indonesia. The results showed that wood silicification was controlled by the infiltration of silica from the host rock into the spaces of the wood structure. In Jasinga, they are controlled by Pliocene tuffaceous sedimentary rocks. The ratio of silica phases revealed a trend in the degree of silicification. Besides silica, the distribution of trace elements also demonstrates the geochemical interaction between the wood fossil and host rock. Wood fossils are affected by the gradual replacement of organic carbon-based materials with silica through silicification. Silica enrichment occurs in the internal of wood, facilitates permineralization and recrystallization. Silica replaces organic material and preserves the wood structures. The microanalytical approach provides comprehensive perspectives on wood petrification, leads to better insights for paleontological studies.

The first outbreak of Lumpy Skin Disease in Indonesia.

This study describes the first outbreak of Lumpy Skin Disease (LSD) in cattle in the Bengkalis region, Indonesia, and vaccination to control the epidemic. Data on the outbreak and vaccination was obtained from the local veterinary authority of the Bengkalis region, Indonesia. Climatological data was provided by the Meteorological, Climatological, and Geophysical Agency of Riau Province. Over the 5.5 months, the outbreak caused 10.4% (94/906) morbidity and 0.6% (6/906) mortality of cattle on infected farms. Temporally, three epidemic waves occurred during the outbreak period. Villages with cattle populations of > 150 animals (n = 36) were 5.3 times more likely to be infected with LSD compared to villages with smaller cattle populations (n = 107) (CI: 2.56-10.90, P < 0.01). The vaccination campaign covered 43.8% of cattle in villages within a 10 km radius of the cases. However, vaccination in villages with larger cattle populations (n = 29) was 0.63 less likely to cover 50% of the cattle populations compared to villages with smaller cattle populations (n = 41) (CI: 0.39-1.02, P = 0.05). By the time the first two and the major waves ceased, vaccination had covered only 0.0% (n = 6036), 27.8% (n = 6,036) and 9.7% (n = 5,697) of the cattle in the 10 km radius of the respective spatial clusters. The outbreak was statistically associated with rainfall and its interaction with temperature (F(2, 13) = 5.822, R2 = 0.47, P = 0.016). This study indicates that the LSD outbreak had low morbidity and mortality. Despite the low vaccination rate, the outbreak ceased, possibly due to plummeting of the abundance of insect vectors.

Leveraging Google Trends to identify Indonesian tuberculosis trends before and after the implementation of a national mandatory notification system.

BACKGROUND: Tuberculosis (TB) burden and the underreporting of TB remain major health challenges in Indonesia. Interest in the internet is growing extensively, and the introduction of the TB mandatory electronic notification system in 2017 engaged the public's interest to leverage digital traces regarding TB information in Indonesia. OBJECTIVE: To quantify the correlation between Google Trends data and Indonesian TB surveillance data before and after the implementation of a mandatory TB notification system. METHODS: Google Trends searches on TB information were used. We used two sets of time series data, including before and after the launch of the TB notification system. Pearson's correlation was used to measure the correlation between TB search terms and official TB reports. RESULTS: The moving average graph showed a linear pattern of TB information with TB reports after 2017. Pearson's correlation estimated a high correlation for TB definition, TB symptoms, and official TB reports with an R-value range of 0.97 to -1.00 (p ≤ 0.05) and showed an increasing trend in TB information searching after 2016. CONCLUSION: Google Trends data can depict public interest in the TB epidemic. Validation of information-searching behavior is required to advocate the implementation of Google Trends for TB digital surveillance in Indonesia.

Pilot implementation MitraTB application to strengthening district based public private mix tuberculosis control in Purwakarta district, Indonesia: A mixed-method study.

BACKGROUND: District-based public private mix (DPPM) tuberculosis in Purwakarta district was strengthened by the MitraTB application. This research is aimed to explore perception of user about MitraTB application and measure their perception of this application in dimensions; design, usefulness, ease of use, and acceptance. METHODS: This study was exploratory sequential mixed methods research. A qualitative study was first conducted in order to gain an in-depth understanding about user's perception of MitraTB application through in-depth interviews. Data were analyzed through coding and categorizing. Based on qualitative finding, a questionnaire was developed and used in the following quantitative study. A cross sectional study was then conducted in quantitative phase. Data were analyzed using Rasch modeling. RESULT: The design of the MitraTB application looks simple and attractive to users. This application is useful to make it easier for private practitioners to report TB cases and it is easy to use. Respondents can accept the MitraTB application well. Most respondents have good perception about MitraTB application in dimensions; design (56.25%), usefulness (69.79%), ease of use (55.20%), and acceptance (73.96%). CONCLUSIONS: MitraTB application has a good design feature, useful, easy to use, and acceptable. This application facilitates the private sector to be involved in the TB program by reporting TB cases. Follow-up and local regulations are required for the continued use of this application.

Experience and number of patients as associated factors toward clinical confidence among nursing students in caring for tuberculosis patients in Indonesia.

BACKGROUND: Nurses and nursing students are at greater risk of tuberculosis (TB) exposure due to their higher intensity contact with patients. In Indonesia, a country with high TB incidence, it is crucial to assess undergraduate nursing students' clinical confidence during their clinical practicums. PURPOSE: This study aimed to explore factors associated with nursing students' clinical confidence in caring for TB patients. METHODS: This cross-sectional study utilized an internet survey based on the United States National TB Curriculum Consortium (NTCC) in September and November 2020. The survey questions focused on TB knowledge, beliefs about the value of TB instruction, and clinical confidence in caring for TB patients. Descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and hierarchical regression were used for data analysis. The Indonesian version of the original NTCC survey was used. RESULTS: The study found that nursing students' knowledge about TB increased with their year of study (r = 0.290, p < .001). However, students perceived TB instruction as less valuable as they neared graduation (r = -0.233, p < .001) and with more frequent practice in the TB unit (r = -0.162, p < .001). Students who spent more time learning about TB outside of class perceived the TB instruction in the nursing curriculum more positively (r = 0.181, p < .004). The study also found a significant difference between nursing students' belief in the value of TB education and their clinical confidence in caring for TB patients (F = 5.711, p < .001). Furthermore, experience caring for TB patients and the number of TB patients cared for predicted clinical confidence. CONCLUSIONS/IMPLICATIONS: This study highlights the need for improved curriculum content and teaching methods regarding TB for nursing students. It also suggests that experience caring for TB patients and the number of TB patients cared for can improve clinical confidence in nursing students. Given the high incidence of TB in Indonesia, this study's findings could have important implications for the country's healthcare system.

The need for active and integrated involvement of the community and health professionals in the prevention and control of dengue hemorrhagic fever in Indonesia.

Successful control and prevention of dengue fever requires active involvement from all parties. For this reason, three innovative programs are needed, namely: i) increasing knowledge, attitude and practice (KAP) of the community and health professionals as capital in controlling dengue fever in a sustainable manner; ii) application of "3M Plus" to suppress vector breeding in household settings; iii) promotion of the "Jumantik" program as an effective community empowerment approach to prevent and control dengue fever based on community independence. It was concluded that successful control of dengue fever requires integration of the community and health workers through various innovative programs.

Early evolution of small body size in Homo floresiensis.

Recent discoveries of Homo floresiensis and H. luzonensis raise questions regarding how extreme body size reduction occurred in some extinct Homo species in insular environments. Previous investigations at Mata Menge, Flores Island, Indonesia, suggested that the early Middle Pleistocene ancestors of H. floresiensis had even smaller jaws and teeth. Here, we report additional hominin fossils from the same deposits at Mata Menge. An adult humerus is estimated to be 9 - 16% shorter and thinner than the type specimen of H. floresiensis dated to ~60,000 years ago, and is smaller than any other Plio-Pleistocene adult hominin humeri hitherto reported. The newly recovered teeth are both exceptionally small; one of them bears closer morphological similarities to early Javanese H. erectus. The H. floresiensis lineage most likely evolved from early Asian H. erectus and was a long-lasting lineage on Flores with markedly diminutive body size since at least ~700,000 years ago.

Correlation of Posterior Tibial Tendon Ultrasound with Calcaneal Inclination Angle in Indonesian Professional Athletes with Medial Ankle Pain.

Background: Adult-acquired flatfoot deformity (AAFD) is characterized by partial or complete flattening of the longitudinal medial arch, which develops after maturity. AAFD secondary to posterior tibialis tendon dysfunction (PTTD) is one of professional athletes' most common foot and ankle pathologies. Different modalities and procedures can be used to establish the diagnosis of AAFD and PTTD. However, imaging measurements such as the calcaneal inclination index and ultrasonography (US) of the posterior tibialis tendon (PTT) in professional athletes with medial ankle and focal pain along the PTT have yet to be widely studied. This study investigates the correlation of PTT ultrasound for evaluating PTTD with calcaneal inclination angle (CIA) for evaluating AAFD in professional athletes with medial ankle and focal pain along the PTT. Through this study, clinicians and radiologists may benefit from considering AAFD in athletes with PTTD. Methods: 112 Indonesian professional athletes with medial ankle or foot pain and focal pain along the direction of the PTT underwent foot radiography using the CIA and ankle ultrasound to observe PTT abnormalities. Results: A negative correlation between fluid thickness surrounding the PTT and the CIA (p<0.001; 95% CI - 0.945, - 0.885), as well as a negative correlation between PTT thickness and CIA (p<0.001, 95% CI - 0.926, - 0.845), with a correlation coefficient (r) of - 0.921 and - 0.892, respectively. No significant correlation was found between PTT tear and CIA (p = 0.728; 95% CI -0.223, - 0.159; r - 0.033). Conclusion: This study showed a negative correlation between PTTD and AAFD via ultrasound and CIA in professional athletes with medial ankle and focal pain along the PTT. A better understanding of PTTD and AAFD imaging will lead to more effective management and prompt treatment.