Inside CKD aims to assess the burden of chronic kidney disease (CKD) and the cost-effectiveness of screening programmes in Belgium.

Microsimulation-based modelling.

Data derived from national statistics and key literature from Belgium.

Virtual populations of ≥10 million individuals, representative of Belgian populations of interest, were generated based on published data and cycled through the Inside CKD model. Baseline input data included age, estimated glomerular filtration rate (eGFR), urine albumin-creatinine ratio (UACR) and CKD status.

Outcomes included the clinical and economic burden of CKD during 2022–2027 and the cost-effectiveness of two different CKD screening programmes (one UACR measurement and two eGFR measurements or only two eGFR measurements, followed by renin-angiotensin-aldosterone system inhibitor treatment in newly diagnosed eligible patients). The economic burden estimation included patients diagnosed with CKD stages 3–5; the screening cost-effectiveness estimation included patients aged ≥45 years with no CKD diagnosis and high-risk subgroups (with cardiovascular disease, hypertension, type 2 diabetes or aged ≥65 years).

Between 2022 and 2027, CKD prevalence is estimated to remain stable and substantial at approximately 1.66 million, with 69.9% undiagnosed. The total healthcare cost of patients diagnosed with CKD is expected to remain stable at approximately 2.15 billion per year. The one UACR, two eGFR measurement screening programme was cost-effective in all populations, with an incremental cost-effectiveness ratio of 3623 per quality-adjusted life year (QALY) gained in those aged ≥45 years, well below the estimated willingness-to-pay threshold of 43 839 per QALY gained.

Without changes to current practice, the disease burden of CKD in Belgium is predicted to remain substantial over the next few years. This highlights the need for timely diagnosis of CKD and demonstrates that, in line with guideline recommendations, implementing a CKD screening programme involving UACR and eGFR measurements followed by treatment would be cost-effective.

Post-COVID-19 syndrome, defined by persistent symptoms lasting beyond 12 weeks of a SARS-CoV-2 infection, affects both severe and mild COVID-19 cases. Fatigue is the most common symptom, impacting 58% of patients. Other symptoms include mental symptoms, cardiovascular and respiratory issues and autonomic dysfunction. Chronic inflammation and immune dysregulation seem to be associated with post-COVID-19 fatigue. Despite its impact on healthcare and the economy, effective treatments are limited. Yoga and health education have been shown to be effective for fatigue in other related conditions. The aim of this study, therefore, is to investigate the efficacy, safety and cost-effectiveness of yoga and health education on post-COVID-19 persistent fatigue.

A randomised controlled trial with 100 patients with persistent fatigue due to post-COVID-19 syndrome is being conducted at three study centres. Patients are randomised to two interventions, yoga and health education. Both interventions include 12 weeks of 90 min supervised group sessions and 60 min of home practice per week. The primary outcome measure is fatigue on the Chalder Fatigue Scale 12 weeks after randomisation. Secondary outcome measures include postexertional malaise (DePaul Symptom Questionnaire), health-related quality of life (Short Form Health Survey-12 Item Version, EuroQol 5-Dimension 5-Level Questionnaire), anxiety, depression (Hospital Anxiety and Depression Scale), stress (Perceived Stress Scale), sleep quality (Pittsburgh Sleep Quality Index), hand grip strength, laboratory parameters and adverse events. Physical activity analysis over 7 days using a body-worn sensor and 24-hour heart rate variability using a 3-channel ECG recorder are assessed exploratively. All outcome measures will be assessed 12 and 24 weeks after randomisation. In addition, health economic analyses as well as mediator and moderator analyses including self-reported body awareness, self-efficacy, personality traits and treatment credibility/expectations will be conducted. Furthermore, qualitative interviews at week 12 will be carried out.

The trial received ethical approval from the Ethics Committee of the University Hospital Tübingen (approval number: 775/2022BO2). Results will be disseminated via peer-reviewed open-access publications, scientific conferences and targeted communication to patient organisations, healthcare providers and the wider public.

NCT05890599.