Institut für Klinische Epidemiologie und Biometrie
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Institute
- Institut für Klinische Epidemiologie und Biometrie (183)
- Deutsches Zentrum für Herzinsuffizienz (DZHI) (27)
- Medizinische Klinik und Poliklinik I (27)
- Neurologische Klinik und Poliklinik (16)
- Graduate School of Life Sciences (13)
- Klinik und Poliklinik für Thorax-, Herz- u. Thorakale Gefäßchirurgie (8)
- Klinik und Poliklinik für Anästhesiologie (ab 2004) (6)
- Klinik und Poliklinik für Psychiatrie, Psychosomatik und Psychotherapie (6)
- Medizinische Klinik und Poliklinik II (5)
- Institut für Allgemeinmedizin (4)
Sonstige beteiligte Institutionen
- Clinical Trial Center (CTC) / Zentrale für Klinische Studien Würzburg (ZKSW) (5)
- Klinische Studienzentrale (Universitätsklinikum) (2)
- Comprehensive Cancer Center Mainfranken, University Hospital Würzburg, Würzburg, Germany (1)
- Deutsches Zentrum für Herzinsuffizienz (1)
- Interdisziplinäre Zentrum für Klinische Forschung (IZKF) (1)
- Medizinische Klinik und Poliklinik 1, Abteilung Kardiologie (1)
- Medizinische Klinik und Poliklinik 1, Abteilung Nephrologie (1)
- Servicezentrum Medizin-Informatik (1)
- Servicezentrum Medizin-Informatik (Universitätsklinikum) (1)
- Universitätsklinikum Würzburg (UKW) (1)
Onkologische Patienten sowie klinische Forscher zeigen zunehmendes Interesse an Yogainterventionen als komplementäres Therapieverfahren zur Behandlung psychischer und körperlicher Beschwerden. Kurzzeitige Effekte von Yogatherapien auf die häufig krebsassoziierten Symptome Angst, Depressivität und Fatigue wurden in zahlreichen Studien untersucht. Die Ergebnisse der Untersuchungen legen nahe, dass Tumorpatienten unmittelbar nach einer Yogaintervention eine Verbesserung der genannten Symptome erleben. Allerdings ist bisher unzureichend untersucht, ob ein Rückgang von Angst, Depressivität und Fatigue langfristig besteht.
Ziel der Studie war es daher, nachhaltige Veränderungen von Angst, Depressivität und Fatigue bei Tumorpatienten im Rahmen einer achtwöchigen Yogaintervention zu untersuchen. Wir nahmen an, dass Angst, Depressivität und Fatigue sechs Monate nach einer Yogaintervention genauso niedrig wie unmittelbar nach der Intervention sind und sich signifikant von den Ausgangswerten vor der Intervention unterscheiden. Außerdem sollte untersucht werden, wie viele Teilnehmer die Yogapraxis nach einer Yogaintervention fortführen und ob sich dies auf die Zielparameter auswirkt.
Durch eine klinische Studie im Prä-Post-Design wurden die Hypothesen geprüft. Dazu wurden Daten von 58 Teilnehmern mit unterschiedlichen Tumorerkrankungen vor, unmittelbar nach und sechs Monate nach einer achtwöchigen Gentle Hatha- Yogaintervention mittels standardisierter psychologischer Fragebögen gesammelt.
Die Mehrheit der Studienteilnehmer war weiblich (90%) und wies anamnestisch eine Mammakarzinom-Erkrankung auf (55%). Die Ergebnisse legen nahe, dass Angst und Fatigue zwischen Interventionsende und sechs Monaten später leicht zunahmen, wohingegen depressive Symptome stabil blieben. Im Vergleich zu den Ausgangswerten vor der Intervention waren Angst, Depressivität und Fatigue sechs Monate nach Interventionsende signifikant reduziert. Ein halbes Jahr nach Beendigung der Yogaintervention gaben 69% der Teilnehmer an, weiterhin Yoga zu praktizieren. Befragungen zeigten, dass die Teilnehmer subjektiv von der Yogapraxis profitierten. Die fortgeführte Yogapraxis stand jedoch nicht mit der Ausprägung von Angst, Depressivität und Fatigue zum Follow-up-Zeitpunkt in Zusammenhang.
Die Ergebnisse deuten darauf hin, dass Tumorpatienten langfristig von einer Verbesserung von Angst, Depressivität und Fatigue im Rahmen einer Yogatherapie profitieren könnten. Ein kausaler Zusammenhang zwischen Yogatherapie und der gefundenen Verbesserung sechs Monate nach Therapieende konnte jedoch durch die fehlende Kontrollbedingung nicht belegt werden. In Zukunft sollten große randomisierte kontrollierte Studien die vermutete Kausalität untersuchen.
Background
Pneumonia frequently complicates stroke and has amajor impact on outcome. We derived and internally validated a simple clinical risk score for predicting stroke-associated pneumonia (SAP), and compared the performance with an existing score (A\(^{2}\)DS\(^{2}\)).
Methods and Results
We extracted data for patients with ischemic stroke or intracerebral hemorrhage from the Sentinel Stroke National Audit Programme multicenter UK registry. The data were randomly allocated into derivation (n=11 551) and validation (n=11 648) samples. A multivariable logistic regression model was fitted to the derivation data to predict SAP in the first 7 days of admission. The characteristics of the score were evaluated using receiver operating characteristics (discrimination) and by plotting predicted versus observed SAP frequency in deciles of risk (calibration). Prevalence of SAP was 6.7% overall. The final 22-point score (ISAN: prestroke Independence [modified Rankin scale], Sex, Age, National Institutes of Health Stroke Scale) exhibited good discrimination in the ischemic stroke derivation (C-statistic 0.79; 95% CI 0.77 to 0.81) and validation (C-statistic 0.78; 95% CI 0.76 to 0.80) samples. It was well calibrated in ischemic stroke and was further classified into meaningful risk groups (low 0 to 5, medium6 to 10, high 11 to 14, and very high >= 15) associated with SAP frequencies of 1.6%, 4.9%, 12.6%, and 26.4%, respectively, in the validation sample. Discrimination for both scores was similar, although they performed less well in the intracerebral hemorrhage patients with an apparent ceiling effect.
Conclusions
The ISAN score is a simple tool for predicting SAP in clinical practice. External validation is required in ischemic and hemorrhagic stroke cohorts.
Bei Patienten mit einer kolorektalen Krebserkrankung zeigt sich ein deutlicher Zusammenhang zwischen Angst und Depressivität und dem psychosozialen Unterstützungsbedarf. Zwischen Angst und Depressivität und unbefriedigten Informationsbedürfnissen scheint ebenfalls ein schwacher Zusammenhang zu bestehen. Für eine mögliche Präferenz von anonymen Informationsquellen bei Patienten mit Angst oder Depressivität findet sich im Untersuchten Patientenkollektiv kein Anhaltspunkt.
Background:
Factors influencing access to stroke unit (SU) care and data on quality of SU care in Germany are scarce. We investigated characteristics of patients directly admitted to a SU as well as patient-related and structural factors influencing adherence to predefined indicators of quality of acute stroke care across hospitals providing SU care.
Methods:
Data were derived from the German Stroke Registers Study Group (ADSR), a voluntary network of 9 regional registers for monitoring quality of acute stroke care in Germany. Multivariable logistic regression analyses were performed to investigate characteristics influencing direct admission to SU. Generalized Linear Mixed Models (GLMM) were used to estimate the influence of structural hospital characteristics (percentage of patients admitted to SU, year of SU-certification, and number of stroke and TIA patients treated per year) on adherence to predefined quality indicators.
Results:
In 2012 180,887 patients were treated in 255 hospitals providing certified SU care participating within the ADSR were included in the analysis; of those 82.4% were directly admitted to a SU. Ischemic stroke patients without disturbances of consciousness (p < .0001), an interval onset to admission time ≤3 h (p < .0001), and weekend admission (p < .0001) were more likely to be directly admitted to a SU. A higher proportion of quality indicators within predefined target ranges were achieved in hospitals with a higher proportion of SU admission (p = 0.0002). Quality of stroke care could be maintained even if certification was several years ago.
Conclusions:
Differences in demographical and clinical characteristics regarding the probability of SU admission were observed. The influence of structural characteristics on adherence to evidence-based quality indicators was low.
Background:
There is growing evidence from the literature that right anterior minithoracotomy aortic valve replacement (RAT-AVR) improves clinical outcome. However, increased cross clamp time is the strongest argument for surgeons not performing RAT-AVR. Rapid deployment aortic valve systems have the potential to decrease cross-clamp time and ease this procedure. We assessed clinical outcome of rapid deployment and conventional valves through RAT.
Methods:
Sixty-eight patients (mean age 76 ± 6 years, 32% females) underwent RAT-AVR between 9/2013 and 7/2015. According to the valve type implanted the patients were divided into two groups. In 43 patients (R-group; mean age 74.1 ± 6.6 years) a rapid deployment valve system (Edwards Intuity, Edwards Lifesciences Corp; Irvine, Calif) and in 25 patients (C-group; mean age 74.2 ± 6.6 years) a conventional stented biological aortic valve was implanted.
Results:
Aortic cross-clamp (42.1 ± 12 min vs. 68.3 ± 20.3 min; p < 0.001) and bypass time (80.4 ± 39.3 min vs. 106.6 ± 23.2 min; p = 0.001) were shorter in the rapid deployment group (R-group). We observed no differences in clinical outcome. Postoperative gradients (R-group: max gradient, 14.3 ± 8 mmHg vs. 15.5 ± 5 mmHg (C-group), mean gradient, 9.2 ± 1.7 mmHg (R-group) vs. 9.1 ± 2.3 mmHg (C-group) revealed no differences. However, larger prostheses were implanted in C-group (25 mm; IQR 23–27 mm vs. 23 mm; IQR 21–25; p = 0.009).
Conclusions:
Our data suggest that the rapid deployment aortic valve system reduced cross clamp and bypass time in patients undergoing RAT-AVR with similar hemodynamics as with larger size stented prosthesis. However, larger studies and long-term follow-up are mandatory to confirm our findings.
Background:
While data from primary care suggest an insufficient control of vascular risk factors, little is known about vascular risk factor control in the general population. We therefore aimed to investigate the adoption of adequate risk factor control and its determinants in the general population free of cardiovascular disease (CVD).
Methods:
Data from the Characteristics and Course of Heart Failure Stages A-B and Determinants of Progression (STAAB) Cohort Study, a population-based study of inhabitants aged 30 to 79 years from the general population of Würzburg (Germany), were used. Proportions of participants without established CVD meeting targets for risk factor control recommended by 2016 ESC guideline were identified. Determinants of the accumulation of insufficiently controlled vascular risk factors (three or more) were assessed.
Results:
Between December 2013 and April 2015, 1379 participants without CVD were included; mean age was 53.1 ± 11.9 years and 52.9% were female; 30.8% were physically inactive, 55.2% overweight, 19.3% current smokers. Hypertension, dyslipidemia, and diabetes mellitus were prevalent in 31.8%, 57.6%, and 3.9%, respectively. Treatment goals were not reached despite medication in 52.7% of hypertensive, in 37.3% of hyperlipidemic and in 44.0% of diabetic subjects. Insufficiently controlled risk was associated with male sex (OR 1.94, 95%CI 1.44–2.61), higher age (OR for 30–39 years vs. 70–79 years 4.01, 95%CI 1.94–8.31) and lower level of education (OR for primary vs. tertiary 2.15, 95%CI 1.48–3.11).
Conclusions:
In the general population, prevalence of vascular risk factors was high. We found insufficient identification and control of vascular risk factors and a considerable potential to improve adherence to cardiovascular guidelines for primary prevention. Further studies are needed to identify and overcome patient- and physician-related barriers impeding successful control of vascular risk factors in the general population.
Secondary Prevention after Minor Stroke and TIA - Usual Care and Development of a Support Program
(2012)
Background: Effective methods of secondary prevention after stroke or TIA are available but adherence to recommended evidence-based treatments is often poor. The study aimed to determine the quality of secondary prevention in usual care and to develop a stepwise modeled support program.
Methods: Two consecutive cohorts of patients with acute minor stroke or TIA undergoing usual outpatient care versus a secondary prevention program were compared. Risk factor control and medication adherence were assessed in 6-month follow-ups (6M-FU). Usual care consisted of detailed information concerning vascular risk factor targets given at discharge and regular outpatient care by primary care physicians. The stepwise modeled support program additionally employed up to four outpatient appointments. A combination of educational and behavioral strategies was employed.
Results: 168 patients in the observational cohort who stated their openness to participate in a prevention program (mean age 64.7 y, admission blood pressure (BP): 155/84 mmHg) and 173 patients participating in the support program (mean age 67.6 y, BP: 161/84 mmHg) were assessed at 6 months. Proportions of patients with BP according to guidelines were 50% in usual-care and 77% in the support program (p<0.01). LDL<100 mg/dl was measured in 62 versus 71% (p = 0.12). Proportions of patients who stopped smoking were 50 versus 79% (p<0.01). 72 versus 89% of patients with atrial fibrillation were on oral anticoagulation (p = 0.09).
Conclusions: Risk factor control remains unsatisfactory in usual care. Targets of secondary prevention were met more often within the supported cohort. Effects on (cerebro-)vascular recurrence rates are going to be assessed in a multicenter randomized trial.
Background:
Standard echocardiography (SE) is an essential part of the routine diagnostic work-up after ischemic stroke (IS) and also serves for research purposes. However, access to SE is often limited. We aimed to assess feasibility and accuracy of point-of-care (POC) echocardiography in a stroke unit (SU) setting.
Methods:
IS patients were recruited on the SU of the University Hospital Würzburg, Germany. Two SU team members were trained in POC echocardiography for a three-month period to assess a set of predefined cardiac parameters including left ventricular ejection fraction (LVEF). Diagnostic agreement was assessed by comparing POC with SE executed by an expert sonographer, and intraclass correlation coefficient (ICC) or kappa (κ) with 95% confidence intervals (95% CI) were calculated.
Results:
In the 78 patients receiving both POC and SE agreement for cardiac parameters was good, with ICC varying from 0.82 (95% CI 0.71–0.89) to 0.93 (95% CI 0.87–0.96), and κ from 0.39 (−95% CI 0.14–0.92) to 0.79 (95% CI 0.67–0.91). Detection of systolic dysfunction with POC echocardiography compared to SE was very good, with an area under the curve of 0.99 (0.96–1.00). Interrater agreement for LVEF measured by POC echocardiography was good with κ 0.63 (95% CI 0.40–0.85).
Conclusions:
POC echocardiography in a SU setting is feasible enabling reliable quantification of LVEF and preliminary assessment of selected cardiac parameters that might be used for research purposes. Its potential clinical utility in triaging stroke patients who should undergo or do not necessarily require SE needs to be investigated in larger prospective diagnostic studies.
Background
Chronic kidney disease (CKD) is a common comorbid condition in coronary heart disease (CHD). CKD predisposes the patient to acute kidney injury (AKI) during hospitalization. Data on awareness of kidney dysfunction among CHD patients and their treating physicians are lacking. In the current cross-sectional analysis of the German EUROASPIRE IV sample we aimed to investigate the physician’s awareness of kidney disease of patients hospitalized for CHD and also the patient’s awareness of CKD in a study visit following hospital discharge.
Methods
All serum creatinine (SCr) values measured during the hospital stay were used to describe impaired kidney function (eGFR\(_{CKD-EPI}\) < 60 ml/min/1.73m2) at admission, discharge and episodes of AKI (KDIGO definition). Information extracted from hospital discharge letters and correct ICD coding for kidney disease was studied as a surrogate of physician’s awareness of kidney disease. All patients were interrogated 0.5 to 3 years after hospital discharge, whether they had ever been told about kidney disease by a physician.
Results
Of the 536 patients, 32% had evidence for acute or chronic kidney disease during the index hospital stay. Either condition was mentioned in the discharge letter in 22%, and 72% were correctly coded according to ICD-10. At the study visit in the outpatient setting 35% had impaired kidney function. Of 158 patients with kidney disease, 54 (34%) were aware of CKD. Determinants of patient’s awareness were severity of CKD (OR\(_{eGFR}\) 0.94; 95%CI 0.92–0.96), obesity (OR 1.97; 1.07–3.64), history of heart failure (OR 1.99; 1.00–3.97), and mentioning of kidney disease in the index event’s hospital discharge letter (OR 5.51; 2.35–12.9).
Conclusions
Although CKD is frequent in CHD, only one third of patients is aware of this condition. Patient’s awareness was associated with kidney disease being mentioned in the hospital discharge letter. Future studies should examine how raising physician’s awareness for kidney dysfunction may improve patient’s awareness of CKD.
Background/Aims:
Acute kidney injury (AKI) is a postoperative complication after cardiac surgery with a high impact on mortality and morbidity. Nephrocheck® [TIMP-2*IGFBP7] determines markers of tubular stress, which occurs prior to tubular damage. It is unknown at which time-point [TIMP-2*IGFBP7] measurement should be performed to ideally predict AKI. We investigated the association of [TIMP-2*IGFBP7] at various time-points with the incidence of AKI in patients undergoing elective cardiac surgery including cardio-pulmonary bypass.
Methods: In a prospective cohort study, serial blood and urine samples were collected from 150 patients: pre-operative, at ICU-admission, 24h and 48h post-surgery. AKI was defined as Serum-Creatinine rise >0.3 mg/dl within 48hrs. Urinary [TIMP-2*IGFBP7] was measured at pre-operative, ICU-admission and 24h post-surgery; medical staff was kept blinded to these results.
Results: A total of 35 patients (23.5%) experienced AKI, with a higher incidence in those with high [TIMP-2*IGFBP7] values at ICU admission (57.1% vs. 10.1%, p<0.001). In logistic regression [TIMP-2*IGFBP7] at ICU admission was independently associated with the occurrence of AKI (Odds Ratio 11.83; p<0.001, C-statistic= 0.74) after adjustment for EuroSCORE II and CBP-time.
Conclusions: Early detection of elevated [TIMP-2*IGFBP7] at ICU admission was strongly predictive for postoperative AKI and appeared to be more precise as compared to subsequent measurements.