Inflammatoire darmziekten (Inflammatory Bowel Disease, IBD) zijn chronische immuun-gemedieerde ziekten van het maag-darmstelsel. Het aandeel oudere patiënten met IBD, 65 jaar of ouder, wordt... Show moreInflammatoire darmziekten (Inflammatory Bowel Disease, IBD) zijn chronische immuun-gemedieerde ziekten van het maag-darmstelsel. Het aandeel oudere patiënten met IBD, 65 jaar of ouder, wordt groter. Het behandelen van deze groep is een uitdaging, omdat zij vaak andere ziekten (comorbiditeit) hebben en geriatrische aandoeningen zoals geheugenproblemen of verminderde spiermassa. Deze aandoeningen vallen onder het begrip kwetsbaarheid, en worden gemeten met een geriatrisch assessment.Dit proefschrift richt zich op het in kaart brengen van de huidige literatuur en behandeloverwegingen bij oudere patiënten met IBD, om daarna als een van de eersten bewijs te leveren voor het invoeren van (screening naar) comorbiditeit en kwetsbaarheid bij de behandeling van oudere patiënten met IBD.Allereerst wordt onderzocht welke factoren bijdragen aan behandelbeslissingen, door behandelaren te interviewen. Leeftijd en aspecten van kwetsbaarheid beïnvloeden behandelbeslissingen, maar behandelaren verschillen onderling in hoe ze deze aspecten gebruiken. Daarnaast liet een literatuur zoektocht zien dat het bewijs over de relatie tussen kwetsbaarheid en behandeluitkomsten schaars is.Ook wordt het verband tussen comorbiditeit en veiligheid van biologicals, medicijnen die ontstekingseiwitten of afweercellen remmen, onderzocht. De aanwezigheid van meer comorbiditeit geeft een hoger risico op bijwerkingen (infecties en ziekenhuisopnames), een hogere leeftijd geeft dat niet.Tenslotte wordt de prevalentie van kwetsbaarheid in een Nederlands cohort van oudere patiënten met IBD onderzocht. Bij ongeveer de helft was er kwetsbaarheid. Hoe kwetsbaarder, hoe hoger de IBD-ziekteactiviteit en de IBD-ziektelast. Kwetsbare patiënten hadden, onafhankelijk van hun leeftijd en IBD-ziekteactiviteit, een hogere kans op ziekenhuisopnames en infecties, maar ook op achteruitgang in zelfstandigheid en kwaliteit van leven. Show less
Luttikhuis, H.M.; Blomaard, L.C.; Kaaij, M.A.E. van der; Gombert-Handoko, K.B.; Groot, B. de; Mooijaart, S.P. 2021
Key summary pointsAim To investigate (a) the prevalence and clinical manifestations of Drug-Related Admissions (DRAs) and the drugs responsible for these admissions, (b) to study the association... Show moreKey summary pointsAim To investigate (a) the prevalence and clinical manifestations of Drug-Related Admissions (DRAs) and the drugs responsible for these admissions, (b) to study the association between geriatric characteristics and DRAs and c) to study the predictive performance of geriatric screening instrument for identifying DRAs in older patients presenting to the Emergency Department (ED). Findings DRAs are prevalent in older hospitalized patients. Polypharmacy, ADL dependency and a high ISAR or ISAR-HP score are associated with higher risk for a DRA, but the predictive value of geriatric screeners is insufficient and therefore they cannot be used alone to predict for Drug-Related Hospital Admissions in Emergency Department. Message Geriatric screening instruments are not specific and sensitive enough to use alone for identifying drug-related hospital admissions in older patients in the ED.Purpose Drug-Related Admissions (DRAs) are a well-known problem among older patients in the Emergency Department (ED). The aim of this study was (a) to investigate the prevalence and clinical manifestations of DRAs and the responsible drugs, (b) to study the association between geriatric characteristics and DRAs, and (c) to study the predictive performance of geriatric screeners for identifying DRAs in older ED patients. Methods Patients aged >= 70 hospitalized from the ED were included. Demographics, geriatric characteristics and medications were collected. The the Acutely Presenting Older Patient (APOP)-screener, the Identification of Seniors At Risk (ISAR) and the ISAR-Hospitalized Patients (ISAR-HP) were used as geriatric screeners. Potential DRAs were identified retrospectively, the association between geriatric screeners and DRAs was investigated with logistic regression and the predictive performance was assessed by calculating the Area under the Curve (AUC) of the Receiver Operator Characteristics (ROC). Results The mean age of patients was 78 (IQR 73-83), using an average of 6 medications. Out of 240 admissions, 77 (30%) were classified as a DRA. Independent risk factors for DRAs were polypharmacy (OR 2.42; 95% CI 1.23-4.74) and the ADL dependency (OR 1.23; 95%CI 1.05-1.44). ISAR (OR 3.27; 95%CI 1.60-6.69) and ISAR-HP (OR 1.83; 95% CI 1.02-3.27) associated with increased risk of DRAs, whereas the APOP screener did not (OR 1.56; 95% CI 0.82-2.97). The predictive performance of all geriatric screeners for predicting DRAs was poor (AUC for all screeners < 0.60). Conclusion DRAs are highly prevalent in older ED patients. Polypharmacy, ADL dependency and a high ISAR or ISAR-HP are associated with higher risk for DRAs, but the predictive value of geriatric screeners is insufficient. Show less
Background: Acutely hospitalised older patients with indications related to internal medicine have high risks of adverse outcomes. We investigated whether risk stratification using the Acutely... Show moreBackground: Acutely hospitalised older patients with indications related to internal medicine have high risks of adverse outcomes. We investigated whether risk stratification using the Acutely Presenting Older Patient (APOP) screening tool associates with clinical outcomes in this patient group.Methods: Patients aged >= 70 years who visited the Emergency Department (ED) and were acutely hospitalised for internal medicine were followed prospectively. The APOP screener assesses demographics, physical and cognitive function at ED presentation, and predicts 3-month mortality and functional decline in the older ED population. Patients with a predicted risk >= 45% were considered 'high risk'. Clinical outcome was hospital length of stay (LOS), and adverse outcomes were mortality and functional decline, 3 and 12 months after hospitalisation.Results: We included 319 patients, with a median age of 80 (IQR 74-85) years, of whom 94 (29.5%) were categorised as 'high risk' by the APOP screener. These patients had a longer hospital LOS compared to 'low risk' patients (5 (IQR 3-10) vs. 3 (IQR 1-7) days, respectively; p = 0.006). At 3 months, adverse outcomes were more frequent in 'high risk' patients compared to 'low risk' patients (59.6% vs. 34.7%, respectively; p < 0.001). At 12 months, adverse outcomes (67.0% vs. 46.2%, respectively; p = 0.001) and mortality (48.9% vs. 28.0%, respectively; p < 0.001) were greater in 'high risk' compared to 'low risk' patients.Conclusion: The APOP screener identifies acutely hospitalised internal medicine patients at high risk for poor short and long-term outcomes. Early risk stratification at admission could aid in individualised treatment decisions to optimise outcomes for older patients. Show less
The emphasis of this thesis lies on complex survival data and on the modelling of this kind of data. Statistical models are developed or adapted and applied to five different real data sets, which... Show moreThe emphasis of this thesis lies on complex survival data and on the modelling of this kind of data. Statistical models are developed or adapted and applied to five different real data sets, which all contain repeated censored measurements. To take into account the correlation between these repeated data, a frailty is considered in all statistical analysis used. Extensions of and alternatives for frailty models are considered. The centre-effect on survival after bone marrow transplantation is studied in chapter 2. Models that are able to take into account a time-dependent frailty are proposed and compared. In chapter 3 survival analysis approaches are used for modelling an ecological capture-recapture data set. In chapter 4, the emphasis lies on the frailty model used in a genetic context. Our model is applied on age at onset of Huntington disease. Chapter 5 concerns the estimation of the correlation between processes with frailties. The approach is applied on the Dutch part of the data set from the Caprie trial, involving cardiac, cerebral and peripheral atherosclerosis. In chapter 6, the point of interest is the marginal survivor curve in different simulated balanced and unbalanced longitudinal situations. Finally, in chapter 7 a general summary can be found. Show less
