Evolution of Physical Frailty and Patient-Reported Outcome Measures in Kidney Transplant Candidates: A Mixed-Methods Longitudinal Study Protocol
Longitudinal Tracking of Physical Frailty and Health-Related Quality of Life Through Patient-Reported Outcome Measures in Adult Candidates on the Kidney Transplant Waiting List
This study looks at how the physical and emotional health of people changes while they wait for a kidney transplant. Waiting for an organ can take a long time. During this period, some patients become "frail." This means they lose strength and are at a higher risk for health problems.
The main goal is to follow these patients over time to better understand their needs. Researchers will use a mobile application to collect Patient-Reported Outcome Measures (PROMs) directly from patients about how they feel and their quality of life. The study will also include personal interviews to learn about the patients' experiences and any difficulties they face when using technology.
The results of this study will help to: • Identify early which patients are losing strength or health. • Improve the support that nurses provide during the transplant waiting period. • Make sure that digital health tools are easy for everyone to use.
In short, this work aims to help patients reach the day of their surgery in the best possible condition.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Study Design and Framework This research employs a convergent-parallel mixed-methods design to evaluate frailty dynamics and patient-reported outcomes in Kidney Transplantation (KT) candidates. The quantitative component is a longitudinal observational study, while the qualitative component is grounded in Heideggerian hermeneutic phenomenology to explore the lived experience of patients during the waiting list period.
Quantitative Procedures and Data Collection Participants will be recruited during their initial KT evaluation at Hospital del Mar (Barcelona). Frailty will be assessed using the Fried Phenotype (assessing weight loss, exhaustion, physical activity, walk time, and grip strength) at baseline and subsequently every six months while the patient remains on the waiting list.
To monitor Patient-Reported Outcome Measures (PROMs), the study utilizes the Patient-Reported Outcomes Measurement Information System (PROMIS)-29 v2.0 questionnaire. This instrument covers seven health domains: physical function, anxiety, depression, fatigue, sleep disturbance, ability to participate in social roles/activities, and pain interference. Data collection will be performed via a digital platform (electronic PROMs [ePROMs]), allowing for real-time monitoring. For patients facing technological or language barriers, an Advanced Practice Nurse (APN) will provide support to ensure data completeness and minimize selection bias.
Qualitative Exploration A purposive sample of participants will undergo in-depth semi-structured interviews. These sessions will focus on the subjective meaning of frailty, the impact of the waiting period on daily life, and the experience of using digital health tools. Interviews will be audio-recorded, transcribed verbatim, and analyzed using thematic analysis to identify core existential themes.
Quality Assurance and Data Management • Data Validation: A data dictionary has been developed, defining each variable, its source, and acceptable ranges to ensure consistency. • Source Data Verification: Data entered into the electronic Case Report Form (eCRF) will be cross-referenced with electronic medical records to ensure accuracy. • Standard Operating Procedures (SOPs): Specific SOPs are in place for patient recruitment, the standardized administration of physical performance tests (e.g., handgrip strength using a dynamometer), and the management of technical issues with the ePROM platform.
Statistical Analysis Plan (SAP) Quantitative data will be analyzed using SPSS (Statistical Package for the Social Sciences, v.25). Descriptive statistics will summarize baseline characteristics. Longitudinal changes in frailty scores and PROMs will be analyzed using linear mixed models or Generalized Estimating Equations (GEE) to account for repeated measures. The relationship between frailty status and PROMs will be assessed using correlation coefficients and multivariate regression models adjusted for age, comorbidity, and time on dialysis.
Missing Data Plan The study aims to minimize missing data through APN-led follow-up. If data are missing at random, multiple imputation techniques will be considered. For patients unable to use digital tools, paper-based alternatives or assisted entry will be provided to reduce non-response bias.
Sample Size Assessment The sample size is based on the prevailing activity of the kidney transplant unit, aiming to include all eligible candidates over the recruitment period (estimated N ≈ 150-200) to ensure sufficient power for detecting longitudinal changes in frailty prevalence and its association with PROMs.
Type d'étude
Inscription (Estimé)
Contacts et emplacements
Coordonnées de l'étude
- Nom: Anna Bach Pascual, RN, MSN i PhDc
- Numéro de téléphone: +34 648653656
- E-mail: abach@hmar.cat
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- Patients aged 18 years or older.
- Diagnosed with Stage 5 chronic kidney disease (CKD).
- Currently undergoing clinical evaluation for or actively listed on the deceased-donor kidney transplant waiting list at Hospital del Mar (Barcelona).
- Cognitive and physical ability to understand and provide written informed consent.
- Ability to use or have regular access to a digital device (smartphone or tablet) for electronic Patient-Reported Outcome Measures (ePROMs) completion.
Exclusion Criteria:
- Severe cognitive impairment or active psychiatric disorders that prevent the reliable completion of questionnaires or physical tests.
- Major physical disability that precludes the objective assessment of gait speed or handgrip strength (e.g., bilateral lower limb amputation or severe dominant hand deformity).
- Acute medical illness requiring hospitalization at the time of enrolment.
- Total language barrier that prevents understanding the study components or the qualitative interview.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
Intervention / Traitement |
|---|---|
|
Kidney Transplant Candidates
This is a single-group observational cohort of adult patients with Stage 5 Chronic Kidney Disease (CKD) undergoing evaluation or active on the deceased-donor kidney transplant waiting list. All participants undergo a longitudinal follow-up every six months to monitor frailty dynamics and health perceptions. Data collection includes:
No clinical intervention or medication will be administered. |
Systematic multidimensional assessment of physical frailty conducted by an Advanced Practice Nurse (APN) specialized in nephrology. The evaluation encompasses the following components:
Frequency: Assessments will be performed at baseline and every 6 months (+/- 1 month) throughout the patient's presence on the kidney transplant waiting list. Standardized protocols ensure data reproducibility.
Autres noms:
Implementation of a digital health strategy to monitor patient-reported outcomes throughout the kidney transplant waiting list period. Core Instrument: Participants complete the Patient-Reported Outcomes Measurement Information System (PROMIS)-29 v2.0 questionnaire, assessing 7 health domains: physical function, anxiety, depression, fatigue, sleep disturbance, social roles/activities, pain interference, and pain intensity. Procedure: • Data Collection: Administered via a secure electronic Patient-Reported Outcome Measures (ePROMs) digital platform accessible via smartphone, tablet, or computer. • Frequency: Data collected at baseline and every 6 months, coinciding with physical frailty assessments. • Support: An Advanced Practice Nurse (APN) provides technical onboarding and follows up on non-compliance to address the digital divide. This observational strategy aims to capture the patient's subjective health status.
Autres noms:
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Change in Frailty Status (Fried Phenotype)
Délai: Baseline, 6 months, 12 months
|
Change in frailty status over time assessed using the Fried Frailty Phenotype cumulative score, with a total score ranging from 0 to 5 points, where higher scores indicate greater physical frailty. Frailty status categories are defined as: Non-frail: 0 points Pre-frail: 1-2 points Frail: 3-5 points The outcome measure will assess longitudinal changes in the cumulative frailty score and frailty category during the patient's time on the kidney transplant waiting list. |
Baseline, 6 months, 12 months
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Change in Patient-Reported Outcome Measures (PROMs)
Délai: Baseline, 6 months, 12 months
|
Change over time in health-related quality of life measured using the Patient-Reported Outcomes Measurement Information System-29 version 2.0 (PROMIS-29 v2.0). PROMIS-29 domain scores are reported as standardized T-scores ranging from approximately 20 to 80, where 50 represents the population mean and 10 the standard deviation. Higher scores indicate more of the concept being measured: Higher physical function and social participation scores indicate better functioning. Higher anxiety, depression, fatigue, sleep disturbance, and pain interference scores indicate worse symptoms. Each PROMIS domain score will be analyzed independently according to PROMIS scoring guidelines. |
Baseline, 6 months, 12 months
|
|
Incidence of Clinical Transitions on the Waiting List
Délai: 12 Months
|
Incidence and time-to-event of major clinical transitions affecting transplant waiting list status, including kidney transplantation, temporary or permanent removal from the waiting list, and all-cause mortality.
|
12 Months
|
|
Digital Tool Usability and Implementation Barriers
Délai: 12 months
|
Assessment of the feasibility and usability of the electronic Patient-Reported Outcome Measures (ePROMs) platform during longitudinal follow-up. Feasibility will be evaluated using questionnaire completion and adherence rates across the study period. Implementation barriers related to technology use and digital access will be identified and categorized through qualitative documentation obtained during Advanced Practice Nurse (APN) follow-up sessions. |
12 months
|
Collaborateurs et enquêteurs
Parrainer
Publications et liens utiles
Publications générales
- Fried LP, Tangen CM, Walston J, Newman AB, Hirsch C, Gottdiener J, Seeman T, Tracy R, Kop WJ, Burke G, McBurnie MA; Cardiovascular Health Study Collaborative Research Group. Frailty in older adults: evidence for a phenotype. J Gerontol A Biol Sci Med Sci. 2001 Mar;56(3):M146-56. doi: 10.1093/gerona/56.3.m146.
- Cella D, Riley W, Stone A, Rothrock N, Reeve B, Yount S, Amtmann D, Bode R, Buysse D, Choi S, Cook K, Devellis R, DeWalt D, Fries JF, Gershon R, Hahn EA, Lai JS, Pilkonis P, Revicki D, Rose M, Weinfurt K, Hays R; PROMIS Cooperative Group. The Patient-Reported Outcomes Measurement Information System (PROMIS) developed and tested its first wave of adult self-reported health outcome item banks: 2005-2008. J Clin Epidemiol. 2010 Nov;63(11):1179-94. doi: 10.1016/j.jclinepi.2010.04.011. Epub 2010 Aug 4.
- Bardes JM, Benjamin E, Schellenberg M, Inaba K, Demetriades D. Old Age With a Traumatic Mechanism of Injury Should Be a Trauma Team Activation Criterion. J Emerg Med. 2019 Aug;57(2):151-155. doi: 10.1016/j.jemermed.2019.04.003. Epub 2019 May 9.
- Chu NM, Deng A, Ying H, Haugen CE, Garonzik Wang JM, Segev DL, McAdams-DeMarco MA. Dynamic Frailty Before Kidney Transplantation: Time of Measurement Matters. Transplantation. 2019 Aug;103(8):1700-1704. doi: 10.1097/TP.0000000000002563.
Liens utiles
- Department of Nephrology, Hospital del Mar (Barcelona). Primary clinical site for participant recruitment and follow-up.
- Official PROMIS HealthMeasures website. Provides detailed information on the validity and scoring of the PROMIS-29 v2.0 questionnaire used in this study.
- Spanish National Transplant Organization (ONT). Provides the regulatory framework and national standards for kidney transplant waiting list management.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Estimé)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
- Maladies urogénitales
- Processus pathologiques
- Maladies urogénitales masculines
- Maladies rénales
- Maladies urologiques
- Maladies urogénitales féminines
- Maladies urogénitales féminines et complications de la grossesse
- Maladie chronique
- Attributs de la maladie
- Insuffisance rénale
- Insuffisance rénale chronique
- Conditions pathologiques, signes et symptômes
- Fragilité
- Insuffisance rénale chronique
Autres numéros d'identification d'étude
- 2024/11603
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Description du régime IPD
Individual participant data (IPD) will not be shared at this time to protect the confidentiality of the participants and the integrity of the ongoing doctoral thesis. The data collected involves sensitive clinical information and qualitative interviews within a specific, small-scale clinical setting (kidney transplant waiting list).
However, the study results will be disseminated through peer-reviewed publications and conference presentations. Requests for access to aggregate data or specific methodological details can be directed to the Principal Investigator and will be considered on a case-by-case basis, subject to approval by the Institutional Review Board (CEIm) and in compliance with the General Data Protection Regulation (GDPR)
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