Age of Blood Does Not Affect Quality of Life and Hemoglobin: N– of −1 Trials in Transfusion-Dependent Patients,
Notice bibliographique
Résumé
Abstract Abstract 3369 Introduction Red blood cell concentrates (RBCs) are stored for up to 42 days. Prolonged storage of RBCs results in “the storage lesion” which has been associated with adverse outcomes in patients with critical illness, sepsis, and post-cardiac surgery. No studies have assessed the impact of the storage lesion on the quality of life (QoL) of patients who require chronic transfusion support. This study assessed the effects of fresh versus standard issue blood on QoL and follow-up hemoglobin (Hb) in transfusion-dependent patients. Methods Transfusion-dependent patients age 18 years or older, were invited to participate in an N-of-1 trial. Transfusion dependence required at least one unit of RBCs every four weeks. Each participant was randomly assigned four fresh (less than seven days of storage) and four standard issue (seven to 42 days of storage) blood transfusions. Investigators, study participants, treating physicians, and nurses were blinded to product allocation. A questionnaire containing a visual analog scale (VAS) and the Functional Assessment of Cancer Therapy-Anemia questionnaire (FACT-An) was completed prior to and 24 hours after each transfusion. Changes were calculated as post-transfusion scores minus pre-transfusion scores. Hemoglobin levels were measured at each subsequent transfusion. Within-subject (each participant) between-treatment comparisons of QoL scores and hemoglobin levels were assessed by unpaired t-tests among participants who completed at least six transfusions. Between-group changes in QoL scores for all participants were assessed by paired t-tests and a mixed model approach. Results Twenty patients were enrolled (mean age 66.8 years, 12 females). Underlying diagnoses included myelodysplastic syndromes (12), β-thalassemia (3), myeloproliferative neoplasms (3), Diamond-Blackfan anemia (1), and chronic anemia of undetermined etiology (1). Mean ages of fresh and standard blood were 4.0 days and 23.2 days, respectively. Nine participants completed at least six transfusions. Among remaining participants, nine were non-compliant, and two died. All data were analysed in the between-group comparisons. There were no statistically significant differences in the effect of standard blood and fresh blood on the eight QoL parameters assessed in all analyses. This was seen in the within subject between-group analysis as well as the between-group analysis. Similarly, there were no statistically significant differences in the effect of standard blood and fresh blood on follow-up Hb levels. Conclusions No significant differences in QoL parameters or follow-up Hb levels were observed in patients receiving fresh versus standard issue blood. These results suggest that local blood transfusion laboratory practices do not need to be altered for transfusion-dependent patient populations. To our knowledge, this is the first study to assess the QoL effects of age of blood on transfusion-dependent patients using N-of-1 trials. While larger studies are needed to confirm these findings, our results demonstrate that N-of-1 studies are feasible and informative in the management of individual patients. The randomized controlled multiple crossover design of N-of-1 studies may be also useful in addressing questions in transfusion medicine regarding differences in the quality of blood products. Disclosures: No relevant conflicts of interest to declare.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,004 | 0,006 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,002 | 0,002 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,002 | 0,002 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,005 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».