High rates of unfavourable TB treatment outcomes observed in Madang Province, Papua New Guinea.

SETTING: Madang Province is located on the northern coast of Papua New Guinea (PNG), a critical mixing point between the populous highlands and more remote regions. Madang Province faces challenges with limited capacity to diagnose and treat TB. OBJECTIVE: To describe the TB caseload and investigate factors associated with known unfavourable treatment outcomes. DESIGN: This is a retrospective cohort study using routinely collected TB programmatic data for treatments commenced 1 January 2019 to 31 December 2021. Using multivariable logistic regression, factors associated with known unfavourable treatment outcomes-death, failure after treatment, and loss to follow-up (LTFU)-were evaluated. RESULTS: Of the 4,668 registered and treated, 3,755 had an evaluated outcome, and 33% had unfavourable outcomes, most commonly LTFU (23%). Unfavourable treatment outcomes were significantly associated with HIV-untested (aOR 2.82 compared to HIV-negative; 95% CI 2.39-3.33), having drug-resistant TB (aOR 3.26 compared to drug-susceptible TB, 95% CI 1.18-9.00), and travel time to the health facility 1-<3 hours by foot (aOR 3.53 compared to <1 hour by foot; 95% CI 1.04-12.06). CONCLUSION: High LTFU from TB treatment was associated with factors that indicate barriers to access to care and treatment completion. Decentralisation and strengthening of TB services for improved person-centred care and treatment support are urgently required in Madang Province.

CADRE: La province de Madang est située sur la côte nord de la Papouasie-Nouvelle-Guinée (PNG), un point de mélange essentiel entre les hauts plateaux peuplés et les régions plus éloignées. La province de Madang est confrontée à des défis avec des capacités limitées pour diagnostiquer et traiter la TB. OBJECTIF: Décrire le nombre de cas de TB et enquêter sur les facteurs associés aux résultats défavorables connus du traitement. METHODE: Il s'agit d'une étude de cohorte rétrospective utilisant des données programmatiques de lutte contre la TB collectées en routine pour les traitements commencés du 1er janvier 2019 au 31 décembre 2021. À l'aide d'une régression logistique multivariée, les facteurs associés aux résultats défavorables connus du traitement (décès, échec après le traitement et perte de suivi [LTFU, pour l'anglais « loss to follow-up ¼) ont été évalués. RÉSULTATS: Sur les 4668 personnes enregistrées et traitées, 3755 ont eu un résultat évalué et 33% ont eu des résultats défavorables, le plus souvent des LTFU (23%). Les résultats défavorables du traitement étaient significativement associés au fait que les personnes n'ayant pas fait l'objet d'un test de dépistage du VIH (OR ajusté [ORa] 2,82 par rapport aux personnes séronégatives ; IC à 95% 2,39­3,33), ayant une TB pharmacorésistante (ORa 3,26 par rapport à la TB sensible aux médicaments, IC à 95% 1,18­9,00) et le temps de déplacement jusqu'à l'établissement de santé étant de 1 à <3 h à pied (ORa 3,53 contre <1 h à pied ; IC à 95% 1,04­12,06). CONCLUSION: Un taux élevé dee LTFU provenant du traitement de la TB était associé à des facteurs indiquant des obstacles à l'accès aux soins et à l'achèvement du traitement. La décentralisation et le renforcement des services de lutte contre la TB pour améliorer les soins centrés sur la personne et le soutien au traitement sont nécessaires de toute urgence dans la province de Madang.

Silence is golden, but my measures still see-why cheaper-but-noisier outcome measures in large simple trials can be more cost-effective than gold standards.

OBJECTIVE: To assess the cost-effectiveness of using cheaper-but-noisier outcome measures, such as a short questionnaire, for large simple clinical trials. BACKGROUND: To detect associations reliably, trials must avoid bias and random error. To reduce random error, we can increase the size of the trial and increase the accuracy of the outcome measurement process. However, with fixed resources, there is a trade-off between the number of participants a trial can enrol and the amount of information that can be collected on each participant during data collection. METHODS: To consider the effect on measurement error of using outcome scales with varying numbers of categories, we define and calculate the variance from categorisation that would be expected from using a category midpoint; define the analytic conditions under which such a measure is cost-effective; use meta-regression to estimate the impact of participant burden, defined as questionnaire length, on response rates; and develop an interactive web-app to allow researchers to explore the cost-effectiveness of using such a measure under plausible assumptions. RESULTS: An outcome scale with only a few categories greatly reduced the variance of non-measurement. For example, a scale with five categories reduced the variance of non-measurement by 96% for a uniform distribution. We show that a simple measure will be more cost-effective than a gold-standard measure if the relative increase in variance due to using it is less than the relative increase in cost from the gold standard, assuming it does not introduce bias in the measurement. We found an inverse power law relationship between participant burden and response rates such that a doubling the burden on participants reduces the response rate by around one third. Finally, we created an interactive web-app ( https://benjiwoolf.shinyapps.io/cheapbutnoisymeasures/ ) to allow exploration of when using a cheap-but-noisy measure will be more cost-effective using realistic parameters. CONCLUSION: Cheaper-but-noisier questionnaires containing just a few questions can be a cost-effective way of maximising power. However, their use requires a judgement on the trade-off between the potential increase in risk of information bias and the reduction in the potential of selection bias due to the expected higher response rates.

Loss to Follow Up Among Glaucoma Patients: An IRIS® Registry (Intelligent Research in Sight) Retrospective Cohort Analysis.

PURPOSE: To identify prevalence of and risk factors for loss to follow up (LTFU) among a national cohort of patients with primary open-angle glaucoma (POAG). METHODS: This retrospective cohort study analyzed data from the IRIS® Registry (Intelligent Research in Sight) database from 2014 through 2019 to assess LTFU among adult patients with POAG. POAG patients with at least one clinical encounter in 2014 were included. LTFU was defined as exceeding one year without a clinical encounter during the study period. RESULTS: Among 553,663 glaucoma patients, 277,019 (50%) became LTFU, of whom 184,548 (67%) never returned to care and 92,471 (33%) re-established follow-up after a lapse. Risk of LTFU was greatest among those younger than 60 years (RR = 1.38; 95% CI: 1.36-1.39) or older than 80 years (RR = 1.39; 95% CI: 1.38-1.40) compared to those in their 60s. Compared to White race, risk for LTFU was highest among Native Hawaiian/Pacific Islander (RR = 1.24; 95% CI: 1.17-1.31), Hispanic ethnicity (RR = 1.19; 95% CI: 1.18-1.20), and Black race (RR = 1.10; 95% CI: 1.09-1.11). Medicare insurance was associated with lower risk of LTFU (RR = 0.79; 95% CI: 0.78-0.79), whereas unknown/missing/no insurance was associated with greater risk (RR = 1.33; 95% CI: 1.32-1.34), compared to private insurance. Compared to mild-stage POAG, risk of LTFU was higher for moderate-stage (RR = 1.10; 95% CI: 1.08-1.13) and severe-stage disease (RR = 1.35; 95% CI: 1.32-1.38). CONCLUSION: We found a 50% prevalence of LTFU among POAG patients in the IRIS Registry over a 6-year study period, with greater risk among minority groups and those with more advanced disease.

Retreatment and Anti-tuberculosis Therapy Outcomes in Brazil Between 2015 and 2022: A Nationwide Study.

Background: Adherence to anti-tuberculosis treatment (ATT) in Brazil remains a challenge in achieving the goals set by the World Health Organization (WHO). Patients who are lost to follow-up during treatment pose a significant public health problem. This study aimed to investigate the factors associated with unfavorable ATT outcomes among those undergoing retreatment in Brazil. Methods: We conducted an observational study of patients aged ≥18 years with tuberculosis (TB) reported to the Brazilian National Notifiable Disease Information System between 2015 and 2022. Clinical and epidemiologic variables were compared between the study groups (new cases and retreatment). Regression models identified variables associated with unfavorable outcomes. Results: Among 743 823 reported TB cases in the study period, 555 632 cases were eligible, consisting of 462 061 new cases and 93 571 undergoing retreatments (44 642 recurrent and 48 929 retreatments after loss to follow-up [RLTFU]). RLTFU (odds ratio [OR], 3.96 [95% confidence interval {CI}, 3.83-4.1]) was a significant risk factor for any type of unfavorable ATT. Furthermore, RLTFU (OR, 4.93 [95% CI, 4.76-5.11]) was the main risk factor for subsequent LTFU. For death, aside from advanced age, living with HIV (OR, 6.28 [95% CI, 6.03-6.54]) was the top risk factor. Conclusions: Retreatment is a substantial risk factor for unfavorable ATT outcomes, especially after LTFU. The rates of treatment success in RLTFU are distant from the WHO End TB Strategy targets throughout Brazil. These findings underscore the need for targeted interventions to improve treatment adherence and outcomes in persons who experience RLTFU.

Active surveillance vs. surgery in low-risk papillary thyroid microcarcinoma patients and the risk of loss to follow-up.

BACKGROUND: Papillary thyroid microcarcinoma (PTMC) management has evolved, with active surveillance (AS) gaining prominence as a management option. However, a key concern for both clinicians and patients is the potential for patient loss to follow-up during AS. AIMS: This study aimed to determine adherence and loss-to-follow-up rates in low-risk PTMC patients undergoing AS versus surgical intervention, in order to gain insights into clinical pathways and safety profiles. MATERIALS AND METHODS: This cohort study analyzed the 2016 data from a single registered institution of Japan's public National Cancer Registry. RESULTS: We identified and retrospectively analyzed the cases of 327 patients diagnosed with low-risk PTMC; 227 patients chose to undergo AS while the other 100 underwent PTMC surgery. Main outcomes were the adherence rate and loss-to-follow-up rate of each group, factors influencing discontinuation, and safety considerations. The rate of AS adoption was substantial in the complete series of 327 low-risk PTMC patients (69.4%). There was a significantly higher loss-to-follow-up rate at 5 years in the AS group (28.6%) compared to the Surgery group (17.8%) (HR 1.62, 95% CI: 1.01-2.61; p = 0.046). Both univariate and multivariate analyses confirmed the significantly higher loss-to-follow-up rate in the AS group as well as in older patients. No deaths due to PTMC progression were observed in the cases lost to follow-up. CONCLUSION: Despite concerns about loss to follow-up, active surveillance remains a safe option for low-risk PTMCs. Consistent follow-up strategies are crucial, and further research is needed to enhance patient counseling and care for the management of patients with PTMC.

Predictors of quality of life, economic impact, and loss to follow-up after open tibial shaft fractures in Ghana.

Objectives: Open tibia fractures are associated with substantial morbidity and impact on quality of life. Despite increasing incidence in low-resource settings, most open tibia fracture research comes from high-resource settings. This study aimed to assess the impact of socioeconomic status on treatment modality and evaluate predictors of health-related quality of life following open tibia fractures in Ghana. Design: A single-center prospective observational study was conducted in Kumasi, Ghana, from May 2020 to April 2022. Adults with open tibial shaft fractures presenting within 2 weeks of injury were eligible. Demographics, comorbidities, socioeconomic factors, and hospital course were collected at enrollment. Follow-up was scheduled at 8, 12, 26, and 52 weeks. A telephone survey assessing reasons for loss to follow-up was initiated on enrollment completion. Results: A total of 180 patients were enrolled. Most patients were employed before injury (79.9%), had government insurance (67.2%), and were from rural areas (59.4%). Fracture classification was primarily Gustilo-Anderson type 3A (49.1%). No relationship between socioeconomic predictors and treatment modality was identified. The largest barriers to follow-up were preference for bonesetter treatment (63.1%), treatment cost (48.8%), and travel cost (29.8%). Of the lost to follow-up patients contacted, 67 (79.8%) reported receiving traditional bonesetter care. Reasons for seeking traditional bonesetter care included ease of access (83.6%), lower cost (77.6%), and familial influence (50.7%). Conclusion: No association was identified between socioeconomic predictors and choice of treatment. Bonesetter treatment plays a substantial role in the care of open tibia fractures in Ghana, largely because of ease of access and lower cost.

Case-control study on challenges in loss of follow-up care and the limitations in the reach of HIV policies for women.

INTRODUCTION: HIV has transitioned from a devastating 1980s epidemic to a manageable chronic condition with antiretroviral therapy. In Brazil, challenges persist, including high detection rates and loss of medical follow-up among people living with HIV/AIDS (PLHIV). Adherence, engagement, and avoiding loss to follow-up are critical for effective HIV/AIDS prevention and care. OBJECTIVES: This case-control study within longitudinal research on PLHIV linkage and retention in Porto Alegre aims to analyze factors associated with treatment abandonment. METHODS: The study, based on patients from the Therapeutic Care Service for HIV and AIDS at Sanatorio Partenon Hospital, involved 360 PLHIV in a retention and linkage outpatient clinic. RESULTS: Risk factors for loss to follow-up include cisgender women, diagnosis between 1991 and 2005, and non-adherence to antiretroviral treatment (ART). Conversely, cisgender men, diagnosis between 2015 and 2023, and good ART adherence were protective factors. CONCLUSION: Gender disparities and ART non-adherence pose significant challenges in comprehensive PLHIV care. Cisgender women diagnosed before 2005 face higher risk, while cisgender men diagnosed after 2015 with good ART adherence are more protected, influencing care and prevention strategies for PLHIV.

Loss to follow-up among people living with HIV on tuberculosis preventive treatment at four regional referral hospitals, Uganda, 2019-2021.

Introduction: Tuberculosis (TB) remains the leading cause of death among people living with HIV (PLHIV). TB preventive treatment (TPT) can prevent active TB infection in PLHIV for several years after it is completed. During 2019-2021, the six-month course of TPT (using isoniazid) was the most readily available in Uganda; however, program data indicated a TPT program loss to follow-up (LTFU) rate of 12 % during this period. We evaluated factors associated with TPT LTFU among PLHIV in four regional referral hospitals (RRHs) in Uganda from 2019 to 2021. Methods: We abstracted program data from TPT registers on patient LTFU at Masaka, Mbale, Mubende, and Jinja RRHs. Additional data collected included client demographics, duration on HIV antiretroviral therapy (ART), year of TPT initiation, adherence, and point of entry. LTFU was defined as the failure to finish six consecutive months of isoniazid without stopping for more than two months at a time. We conducted bivariate analysis using the chi-square test for independence. Variables with p < 0.05 in bivariate analysis were included in a logistic regression model to establish independent factors associated with LTFU. Results: Overall, 24,206 clients were started on TPT in the four RRHs. Their median age was 40 years (range, 1-90 years), and 15,962 (66 %) were female. A total of 22,260 (92 %) had TPT adherence >95 %. Independent factors associated with LTFU included being on ART for <3 months (AOR: 3.1, 95 % CI: 2.1-4.5) and 20-24 years (AOR: 4.7, 95 % CI: 1.9-12) or 25-29 years (AOR: 3.3, 95 % CI: 1.3-8.2) compared to 15-19 years. Conclusions: PLHIV just starting ART and young adults had higher odds of being LTFU from TPT during 2019-2021 in the four RRHs. Close follow-up of PLHIV aged 20-29 years and those newly initiated on ART could improve TPT completion.

Correcting mortality estimates among children and youth on antiretroviral therapy in southern Africa: A comparative analysis between a multi-country tracing study and linkage to a health information exchange.

OBJECTIVES: The objective of this study is to assess the outcomes of children, adolescents and young adults with HIV reported as lost to follow-up, correct mortality estimates for children, adolescents and young adults with HIV for unascertained outcomes in those loss to follow-up (LTFU) based on tracing and linkage data separately using data from the International epidemiology Databases to Evaluate AIDS in Southern Africa. METHODS: We included data from two different populations of children, adolescents and young adults with HIV; (1) clinical data from children, adolescents and young adults with HIV aged ≤24 years from Lesotho, Malawi, Mozambique, Zambia and Zimbabwe; (2) clinical data from children, adolescents and young adults with HIV aged ≤14 years from the Western Cape (WC) in South Africa. Outcomes of patients lost to follow-up were available from (1) a tracing study and (2) linkage to a health information exchange. For both populations, we compared six methods for correcting mortality estimates for all children, adolescents and young adults with HIV. RESULTS: We found substantial variations of mortality estimates among children, adolescents and young adults with HIV reported as lost to follow-up versus those retained in care. Ascertained mortality was higher among lost and traceable children, adolescents and young adults with HIV and lower among lost and linkable than those retained in care (mortality: 13.4% [traced] vs. 12.6% [retained-other Southern Africa countries]; 3.4% [linked] vs. 9.4% [retained-WC]). A high proportion of lost to follow-up children, adolescents and young adults with HIV had self-transferred (21.0% and 47.0%) in the traced and linked samples, respectively. The uncorrected method of non-informative censoring yielded the lowest mortality estimates among all methods for both tracing (6.0%) and linkage (4.0%) approaches at 2 years from ART start. Among corrected methods using ascertained data, multiple imputation, incorporating ascertained data (MI(asc.)) and inverse probability weighting with logistic weights were most robust for the tracing approach. In contrast, for the linkage approach, MI(asc.) was the most robust. CONCLUSIONS: Our findings emphasise that lost to follow-up is non-ignorable and both tracing and linkage improved outcome ascertainment: tracing identified substantial mortality in those reported as lost to follow-up, whereas linkage did not identify out-of-facility deaths, but showed that a large proportion of those reported as lost to follow-up were self-transfers.

Hepatitis C epidemiology and treatment outcomes in Italy: Impact of the DAA era and the COVID-19 pandemic.

HCV infection poses a global health threat, with significant morbidity and mortality. This study examines HCV trends in a large Italian region from 2015 to 2022, considering demographic changes, evolving clinical profiles, treatment regimens and outcomes, including the impact of the COVID-19 pandemic. This multicentre retrospective study analysed demographics, clinical histories and risk factors in 6882 HCV patients. The study spanned before and after the direct-acting antiviral (DAA) era, and the COVID-19 period, focusing on treatment outcomes (SVR12, non-SVR12 and patients lost to follow-up). Statistical methods included ANOVA, multinomial logistic regression, Kruskal-Wallis test and chi-square analysis, and were conducted adhering to the intention-to-treat (ITT) principle. The cohort, mainly Italian males (average age 58.88), showed Genotype 1 dominance (56.6%) and a high SVR12 rate (97.5%). The pandemic increased follow-up losses, yet SVR12 rates remained stable, influenced by factors like age, gender, cirrhosis and comorbidities. Despite COVID-19 challenges, the region sustained high SVR12 rates in HCV care, emphasising the importance of sustained efforts in HCV care. Continuous screening and targeted interventions in high-risk populations are crucial for achieving WHO elimination targets. The study highlights the resilience of HCV care during the pandemic and provides insights for future public health strategies.

Factors Associated with Nonreturn after Loss to Follow-Up from Glaucoma Care: An IRIS® Registry Retrospective Analysis.

PURPOSE: Loss to follow-up (LTFU) in primary open-angle glaucoma (POAG) can lead to undertreatment, disease progression, and irreversible vision loss. Patients who become LTFU either eventually re-establish glaucoma care after a lapse or never return to the clinic. The purpose of this study is to examine a large population of patients with POAG who became LTFU to determine the proportion that return to care and to identify demographic and clinical factors associated with nonreturn after LTFU. DESIGN: Retrospective longitudinal cohort study. PARTICIPANTS: Patients with a diagnosis of POAG with a clinical encounter in 2014 in the IRIS® Registry (Intelligent Research in Sight). METHODS: We examined follow-up patterns for 553 663 patients with POAG who had an encounter in the IRIS Registry in 2014 by following their documented clinic visits through 2019. LTFU was defined as exceeding 1 calendar year without an encounter. Within the LTFU group, patients were classified as returning after a lapse in care (return after LTFU) or not (nonreturn after LTFU). MAIN OUTCOME MEASURES: Proportion of patients with nonreturn after LTFU and baseline demographic and clinical characteristics associated with nonreturn among LTFU patients with POAG. RESULTS: Among 553 663 patients with POAG, 277 019 (50%) had at least 1 episode of LTFU over the 6-year study period. Within the LTFU group, 33% (92 471) returned to care and 67% (184 548) did not return to care. Compared to those who returned to care, LTFU patients with nonreturn were more likely to be older (age >80 years; relative risk [RR] = 1.48; 95% confidence interval [CI]: 1.47-1.50), to have unknown/missing insurance (RR = 1.31; 95% CI: 1.30-1.33), and to have severe-stage POAG (RR = 1.13; 95% CI: 1.11-1.15). Greater POAG severity and visual impairment were associated with nonreturn with a dose-dependent relationship in the adjusted model that accounted for demographic characteristics. Among those with return after LTFU, almost all returned within 2 years of last appointment (82 201; 89%) rather than 2 or more years later. CONCLUSIONS: Half of patients with POAG in the IRIS Registry had at least 1 period of LTFU, and two thirds of LTFU patients with POAG did not return to care. More effort is warranted to re-engage the vulnerable patients with POAG who become LTFU. FINANCIAL DISCLOSURE(S): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.

Exploring Reasons for Loss to Follow-up in Pregnancy of Unknown Location: A Mixed-Methods Study.

Objective: To quantify proportions of loss to follow-up in patients presenting with a pregnancy of unknown location and explore patients' perspectives on follow-up for pregnancy of unknown location. A pregnancy of unknown location is a scenario in which a patient has a positive pregnancy test but the pregnancy is not visualized on transvaginal ultrasound. Study Design: We conducted a retrospective cohort study of patients with pregnancy of unknown location who presented to an urban academic emergency department or complex family planning outpatient office. We sought to calculate the proportion of patients lost to follow-up, defined as inability to contact the patient within 2 weeks. We then conducted focus groups of patients diagnosed with a pregnancy of unknown location. We used thematic analysis to identify themes related to follow-up. Results: We reviewed 464 charts of patients diagnosed with pregnancy of unknown location. The median age in this cohort was 27 with most patients identifying as Black (80%, n = 370) and using public insurance (67%, n = 315). When looking at loss to follow-up rates, Black patients experienced loss to follow-up (20%, n = 72) more often than White patients (4%, n = 2; p = 0.003). Focus group participants had a mean age of 31.8+/-4.8, and the majority were of Black race (n = 16, 72.7%). Participants identified barriers to follow-up including the long duration of management, general inconvenience, and poor communication with their health care team. Participants felt a burden of responsibility to learn about their condition and to self-advocate for their follow-up and communication of results. Conclusions: These data indicate that Black patients are more likely to experience loss to follow-up compared with White patients during monitoring for pregnancy of unknown location. Patients identified many barriers to follow-up and felt that successful follow-up required substantial self-efficacy.

Factors affecting patient retention to hypertension treatment in a North Indian State: A mixed-method study.

Hypertension is a global health challenge, especially in low-to-middle-income countries, where awareness and control are suboptimal. Despite available treatments, poor medication adherence hampers blood pressure control, leading to adverse outcomes and increased costs. In response, the GOI has initiated national action plans to address noncommunicable diseases, including hypertension. The study aimed to analyze patient retention rates in hypertension treatment across healthcare levels and understand providers' and patients' perspectives on control factors. Using a mixed-method concurrent design in a North Indian district, retrospective data collection covered hypertensive patients registered from January 2020 to July 2020, followed for a year (August 2020-July 2021). Quantitative data included socio-demographic characteristics and patient follow-up rates. Qualitative data comprised focus group discussions (FGD) and in-depth interviews (IDI) with healthcare providers (HCPs) and patients. Findings identified challenges in patient retention and medication adherence, notably among females and at higher-level healthcare facilities, leading to substantial loss of follow-up. Only 63% of hypertensive outpatients maintained controlled blood pressure in the past year. Male patients exhibited more consistent attendance than females. Despite sufficient HCP knowledge, patient retention was better at Health and Wellness Centers (HWCs) levels, while blood pressure control was poorer at higher facilities. Barriers such as medication side effects, pill burden, and limited healthcare access hindered hypertension control, highlighting the need for improved primary care services, including extended clinic hours and diagnostic facilities. Improving hypertension control requires addressing medication adherence and healthcare access barriers. Strengthening primary care services and implementing patient-centered interventions are crucial steps.

Preferences for Follow-Up Procedures among Patients Lost to Follow-Up after Smoking Cessation Intervention among Therapists-An Interview Study.

Achieving high follow-up rates after smoking cessation interventions (SCIs) is a general challenge. The aim of this study was to identify preferences among patients and therapists for improving follow-up rates and to assess smoking status at 6 months among patients lost to follow-up. From the Danish STOPbase for Tobacco and Nicotine, which collects data on SCI across health care, 20 representative patients lost to follow-up by routine procedures were identified together with 11 therapists. All participated in individual semi-structured phone interviews, which for patients also included 6-month smoking status. Deductive and inductive analyses were performed. Four themes emerged from the analyses with several subthemes, all regarding contacts. Both patients and therapists preferred to intensify the follow-up process by boosting it with additional attempts and using voice messages, e-mail and/or SMS, calling at specified times of the day and avoiding calls from unknown numbers. In addition, some patients mentioned that they were busy or were not carrying their mobile devices at the time of a call as a barrier. Some therapists mentioned that barriers could include an expectation of relapse, but also a poor mental state, the time of day and patient fear of public systems. Among the patients originally lost to follow-up, 35% (95% CI 16%-59%) experienced continuous smoking cessation for 6 months, and the overall national rate was 22% (21.6-23.3%). In conclusion, both patients and therapists preferred intensified follow-up. The 6-month smoking status for patients lost to follow-up seemed to be similar to that of the routinely followed-up patients. These findings will be examined experimentally in a larger study.

Developing survey weights to ensure representativeness in a national, matched cohort study: results from the children and young people with Long Covid (CLoCk) study.

BACKGROUND: Findings from studies assessing Long Covid in children and young people (CYP) need to be assessed in light of their methodological limitations. For example, if non-response and/or attrition over time systematically differ by sub-groups of CYP, findings could be biased and any generalisation limited. The present study aimed to (i) construct survey weights for the Children and young people with Long Covid (CLoCk) study, and (ii) apply them to published CLoCk findings showing the prevalence of shortness of breath and tiredness increased over time from baseline to 12-months post-baseline in both SARS-CoV-2 Positive and Negative CYP. METHODS: Logistic regression models were fitted to compute the probability of (i) Responding given envisioned to take part, (ii) Responding timely given responded, and (iii) (Re)infection given timely response. Response, timely response and (re)infection weights were generated as the reciprocal of the corresponding probability, with an overall 'envisioned population' survey weight derived as the product of these weights. Survey weights were trimmed, and an interactive tool developed to re-calibrate target population survey weights to the general population using data from the 2021 UK Census. RESULTS: Flexible survey weights for the CLoCk study were successfully developed. In the illustrative example, re-weighted results (when accounting for selection in response, attrition, and (re)infection) were consistent with published findings. CONCLUSIONS: Flexible survey weights to address potential bias and selection issues were created for and used in the CLoCk study. Previously reported prospective findings from CLoCk are generalisable to the wider population of CYP in England. This study highlights the importance of considering selection into a sample and attrition over time when considering generalisability of findings.

Risk Factors Associated with Loss to Follow-Up during Tuberculosis Treatment in the Sanatorium Hospital of Luanda, Angola.

BACKGROUND: Tuberculosis (TB) continues to be a serious public health threat that affects the most vulnerable populations. Patients who are lost to follow-up (LTFU) after TB diagnosis still represent one of the biggest challenges to TB control. METHOD: In this prospective observational study, we aimed to identify and analyse the risk factors associated with LTFU among TB patients who started first-line TB treatment in the Sanatorium Hospital in Luanda. RESULT: A total of 113 patients with TB (non-multidrug resistant) were included between August 2018 and September 2019. Seventy-six (67.3%) patients were cured, 27 (23.9%) were LTFU, 5 (4.4%) died, 4 (3.5%) were transferred and 1 (0.9%) presented treatment failure. After excluding those who died, were transferred or failed treatment, we observed that severe TB at the time of diagnosis (OR 9.24, 95% CI 2.18-39.04) and food insecurity were significantly associated with LTFU (OR 5.96, 95% CI 1.66-21.41). CONCLUSIONS: The findings of our study can contribute to understanding the reasons for the LTFU of patients with TB and can guide policies and facilitate designing measures to allow better adherence and, therefore, greater treatment success.

Ensuring continuous TB treatment across Asian borders.

BACKGROUND: Mid-treatment cross-border migration of patients with TB increases the risk of treatment interruption. OBJECTIVE: To establish a cross-border referral process for patients with TB in Japan, and enhance their access to health facilities and treatment outcomes. DESIGN: This prospective cohort study describes and assesses the process of foreign-born patients with TB who returned to their home countries during treatment, focusing on their access to healthcare facilities and treatment outcomes. RESULTS: We enrolled 135 foreign-born patients with TB, and confirmed that 112 (83.0%) were referred to and accessed healthcare facilities after returning to their home countries. Of 102 patients due to complete treatment as of July 2023, 87 (85.3%) completed their treatment. We did not identify significant differences in the treatment success rate among patient characteristics, except between the patients with confirmed access to a healthcare facility and those without (P < 0.001). We confirmed that 49/87 (56.3%) patients had completed treatment with official data. CONCLUSION: The access and treatment success rates of the cross-bordered patients with TB from Japan were >80%; however, we should further improve this proportion by confirming the treatment outcomes with official data.

CONTEXTE: La migration transfrontalière en milieu de traitement des patients atteints de TB augmente le risque d'interruption du traitement. OBJECTIF: Etablir un processus d'orientation transfrontalière pour les patients atteints de TB au Japon et à améliorer leur accès aux établissements de santé et les résultats de leur traitement. CONCEPTION: Cette étude de cohorte prospective décrit et évalue le processus des patients atteints de TB et nés à l'étranger qui sont retournés dans leur pays d'origine pendant le traitement, en se concentrant sur leur accès aux établissements de santé et sur les résultats du traitement. RÉSULTATS: Nous avons recruté 135 patients atteints de TB et nés à l'étranger et confirmé que 112 (83,0%) ont été orientés vers des établissements de santé et y ont accédé après leur retour dans leur pays d'origine. Des 102 patients qui devaient terminer leur traitement en juillet 2023, 87 (85,3%) l'ont terminé. Nous n'avons pas identifié de différences significatives dans le taux de réussite du traitement en fonction des caractéristiques des patients, sauf entre les patients ayant un accès confirmé à un établissement de santé et ceux qui n'en ont pas (P < 0,001). Nous avons confirmé que 49 (56,3%) des 87 patients avaient terminé leur traitement à l'aide des données officielles. CONCLUSION: Les taux d'accès et de réussite du traitement des patients transfrontaliers atteints de TB en provenance du Japon étaient >85% ; cependant, nous devrions encore améliorer cette proportion en confirmant les résultats du traitement à l'aide de données officielles.

Machine learning algorithms using national registry data to predict loss to follow-up during tuberculosis treatment.

BACKGROUND: Identifying patients at increased risk of loss to follow-up (LTFU) is key to developing strategies to optimize the clinical management of tuberculosis (TB). The use of national registry data in prediction models may be a useful tool to inform healthcare workers about risk of LTFU. Here we developed a score to predict the risk of LTFU during anti-TB treatment (ATT) in a nationwide cohort of cases using clinical data reported to the Brazilian Notifiable Disease Information System (SINAN). METHODS: We performed a retrospective study of all TB cases reported to SINAN between 2015 and 2022; excluding children (< 18 years-old), vulnerable groups or drug-resistant TB. For the score, data before treatment initiation were used. We trained and internally validated three different prediction scoring systems, based on Logistic Regression, Random Forest, and Light Gradient Boosting. Before applying our models we splitted our data into training (~ 80% data) and test (~ 20%) sets, and then compared the model metrics using the test data set. RESULTS: Of the 243,726 cases included, 41,373 experienced LTFU whereas 202,353 were successfully treated. The groups were different with regards to several clinical and sociodemographic characteristics. The directly observed treatment (DOT) was unbalanced between the groups with lower prevalence in those who were LTFU. Three models were developed to predict LTFU using 8 features (prior TB, drug use, age, sex, HIV infection and schooling level) with different score composition approaches. Those prediction scoring systems exhibited an area under the curve (AUC) ranging between 0.71 and 0.72. The Light Gradient Boosting technique resulted in the best prediction performance, weighting specificity and sensitivity. A user-friendly web calculator app was developed ( https://tbprediction.herokuapp.com/ ) to facilitate implementation. CONCLUSIONS: Our nationwide risk score predicts the risk of LTFU during ATT in Brazilian adults prior to treatment commencement utilizing schooling level, sex, age, prior TB status, and substance use (drug, alcohol, and/or tobacco). This is a potential tool to assist in decision-making strategies to guide resource allocation, DOT indications, and improve TB treatment adherence.

Tracking People Living with HIV in Loss to Follow Up in Central Brazil: A Call for Attention to Health Services.

Despite the effectiveness of antiretroviral therapy (ART), human immunodeficiency virus (HIV) infection remains a global public health concern. However, weaknesses in its management regarding access to integrated HIV care include treatment gaps and loss to follow-up (LTFU) from antiretroviral treatment (ART). This study aimed to characterize the epidemiological and clinical profiles of people living with HIV/AIDS (PLHA) in LTFU from HIV care in Campo Grande, Central Brazil. This retrospective cross-sectional study was conducted between January 2021 and April 2022 using secondary data from PLHA who had LTFU in Campo Grande. A total of 852 patients with PLHA were included in this study. The majority of participants in LTFU were male (63.1%), had a CD4 cell count > 200 cells/mm3 (68.2%), and had been treated for ≥ 3 months (86.4%). Only 287 (33.7%) participants had undetectable HIV viral load. Of the total number of patients who returned to treatment during the study period, 448 (54.3%) were LTFU-positive. The tracking strategy was not applied to 556 (65.26%) patients, and 44.4% of the participants had been in spontaneous demand. These results highlight the relevance of patient-centered interventions and the need to ensure early treatment and promote retention in care systems with consequent viral suppression, impacting the healthcare indicators of the population, with emphasis on health managers and stakeholders in HIV care.

Rapid Initiation of Antiretroviral Therapy Under the Treat-All Policy Reduces Loss to Follow-Up and Virological Failure in Routine Human Immunodeficiency Virus Care Settings in China: A Retrospective Cohort Study (2016-2022).

Following the World Health Organization's guidelines for rapid antiretroviral therapy (ART) initiation [≤7 days after human immunodeficiency virus (HIV) diagnosis], China implemented Treat-All in 2016 and has made significant efforts to provide timely ART since 2017. This study included newly diagnosed HIV adults from Tianjin, China, between 2016 and 2022. Our primary outcome was loss to follow-up (LTFU) at 12 months after enrollment. The secondary outcome was 12-month virological failure. The association between rapid ART and LTFU, as well as virological failure, was assessed via Cox regression and logistic regression. A total of 896 (19.1%) of 4688 participants received ART ≤7 days postdiagnosis. The rate of rapid ART has increased from 7.5% in 2016 to 33.3% by 2022. The rapid ART group had an LTFU rate of 3.3%, as opposed to 5.0% in the delayed group. The rapid ART group had a much reduced virological failure rate (0.6% vs. 1.8%). Rapid ART individuals had a reduced likelihood of LTFU [adjusted hazard ratio: 0.65, 95% confidence intervals (CI): 0.44-0.96] and virological failure (adjusted odds ratio: 0.35, 95% CI: 0.12-0.80). The real-world data indicated that rapid ART is practicable and beneficial for Chinese people with HIV, providing evidence for its widespread implementation and scaling up.