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Dive into the research topics where Mark Leys is active.

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Featured researches published by Mark Leys.


Stroke | 2005

Use of Time by Stroke Patients. A Comparison of Four European Rehabilitation Centers

Liesbet De Wit; Koen Putman; Eddy Dejaeger; Ilse Baert; Peter Berman; Kris Bogaerts; Nadine Brinkmann; Louise Connell; Hilde Feys; Walter Jenni; Christiane Kaske; Emmanuel Lesaffre; Mark Leys; Nadina B. Lincoln; Fred Louckx; Birgit Schuback; Wilfried Schupp; Bozena Smith; Willy De Weerdt

Background and Purpose— Differences exist between European countries in the proportion of patients who die or become dependent after stroke. The aim of the present study was to identify differences in the use of time by stroke patients in 4 rehabilitation centers in 4 European countries. Methods— In each of the 4 centers, 60 randomly selected stroke patients were observed at 10-minute intervals using behavioral mapping. Observations took place on 30 weekdays selected at random, on equal numbers of morning, afternoon, and evening sessions. A logistic generalized estimating equation model with correction for differences in case mix and multiple testing was used for the analysis. Results— Overall time available from different professions was the highest in the United Kingdom, but patients in the United Kingdom spent on average only 1 hour per day in therapy. This was significantly less than patients in Belgium and Germany, who spent ≈2 hours, and patients in Switzerland who spent ≈3 hours per day in therapy. In all centers, patients spent less than half their time in interactions and >72% of the time in nontherapeutic activities. Conclusions— Important differences in the use of time were established, which appeared dependent on management decisions rather than the number of staff available. Patients in the Swiss and German centers spent more time in therapy, possibly because of the structured organization of rehabilitation. Further studies will verify whether this has an effect on outcome.


Stroke | 2007

Motor and Functional Recovery After Stroke A Comparison of 4 European Rehabilitation Centers

Liesbet De Wit; Koen Putman; Birgit Schuback; Arnošt Komárek; Felix Angst; Ilse Baert; Peter Berman; Kris Bogaerts; Nadine Brinkmann; Louise Connell; Eddy Dejaeger; Hilde Feys; Walter Jenni; Christiane Kaske; Emmanuel Lesaffre; Mark Leys; Nadina B. Lincoln; Fred Louckx; Wilfried Schupp; Bozena Smith; Willy De Weerdt

Background and Purpose— Outcome after first stroke varies significantly across Europe. This study was designed to compare motor and functional recovery after stroke between four European rehabilitation centers. Methods— Consecutive stroke patients (532 patients) were recruited. They were assessed on admission and at 2, 4, and 6 months after stroke with the Barthel Index, Rivermead Motor Assessment of Gross Function, Rivermead Motor Assessment of Leg/Trunk, Rivermead Motor Assessment of Arm, and Nottingham Extended Activities of Daily Living (except on admission). Data were analyzed using random effects ordinal logistic models adjusting for case-mix and multiple testing. Results— Patients in the UK center were more likely to stay in lower Rivermead Motor Assessment of Gross Function classes compared with patients in the German center (&Dgr;OR, 2.4; 95% CI, 1.3 to 4.3). In the Swiss center, patients were less likely to stay in lower Nottingham Extended Activities of Daily Living classes compared with patients in the UK center (&Dgr;OR, 0.7; 95% CI, 0.5 to 0.9). The latter were less likely to stay in lower Barthel Index classes compared with the patients in the German center (&Dgr;OR, 0.6; 95%CI, 0.4 to 0.8). Recovery patterns of Rivermead Motor Assessment of Leg/Trunk and Rivermead Motor Assessment of Arm were not significantly different between centers. Conclusions— Gross motor and functional recovery were better in the German and Swiss centers compared with the UK center, respectively. Personal self-care recovery was better in the UK compared with the German center. Previous studies in the same centers indicated that German and Swiss patients received more therapy per day. This was not the result of more staff but of a more efficient use of human resources. This study indicates potential for improving rehabilitation outcomes in the UK and Belgian centers.


Stroke | 2006

Stroke Rehabilitation in Europe What Do Physiotherapists and Occupational Therapists Actually Do

Liesbet De Wit; Koen Putman; Nadina B. Lincoln; Ilse Baert; Peter Berman; Hilde Beyens; Kris Bogaerts; Nadine Brinkmann; Louise Connell; Eddy Dejaeger; Willy De Weerdt; Walter Jenni; Emmanuel Lesaffre; Mark Leys; Fred Louckx; Birgit Schuback; Wilfried Schupp; Bozena Smith; Hilde Feys

Background and Purpose— Physiotherapy (PT) and occupational therapy (OT) are key components of stroke rehabilitation. Little is known about their content. This study aimed to define and compare the content of PT and OT for stroke patients between 4 European rehabilitation centers. Methods— In each center, 15 individual PT and 15 OT sessions of patients fitting predetermined criteria were videotaped. The content was recorded using a list comprising 12 therapeutic categories. A generalized estimating equation model was fitted to the relative frequency of each category resulting in odds ratios. Results— Comparison of PT and OT between centers revealed significant differences for only 2 of the 12 categories: ambulatory exercises and selective movements. Comparison of the 2 therapeutic disciplines on the pooled data of the 4 centers revealed that ambulatory exercises, transfers, exercises, and balance in standing and lying occurred significantly more often in PT sessions. Activities of daily living, domestic activities, leisure activities, and sensory, perceptual training, and cognition occurred significantly more often in OT sessions. Conclusion— This study revealed that the content of each therapeutic discipline was consistent between the 4 centers. PT and OT proved to be distinct professions with clear demarcation of roles.


Patient Education and Counseling | 2009

Information needs of parents of children admitted to a neonatal intensive care unit: A review of the literature (1990–2008)

Sofie De Rouck; Mark Leys

OBJECTIVE This literature review focuses on information and communication needs of parents of children admitted to the NICU and on their use of information sources in the illness trajectories at NICU. METHODS Literature search in 4 electronic databases (Ovid Medline, PsycINFO, CINAHL and Sociological Abstracts), covering 1990-March 2008. RESULTS The seventy-eight included articles revealed that NICU parents have high information needs. The illness trajectory mediates parental information needs and induces a changing pattern in information use and information needs. Most attention is paid to the prenatal and acute phases, while information behaviour in sudden events and later phases receives limited attention. CONCLUSIONS In-depth studies on information needs and corresponding use of information sources are lacking. More longitudinal studies are needed, taking the illness trajectory into account and investigating the determinants and outcomes of the information and communication needs of NICU parents. PRACTICE IMPLICATIONS Healthcare professionals should adapt their information provision along the illness trajectory. The development of guidelines of information provision during the illness trajectory at NICU would support all professionals.


Disability and Rehabilitation | 2008

Anxiety and depression in the first six months after stroke. A longitudinal multicentre study

Liesbet De Wit; Koen Putman; Ilse Baert; Nadina B. Lincoln; Felix Angst; Hilde Beyens; Kris Bogaerts; Nadine Brinkmann; Louise Connell; Eddy Dejaeger; Willy De Weerdt; Walter Jenni; Christiane Kaske; Arnošt Komárek; Emmanuel Lesaffre; Mark Leys; Fred Louckx; Birgit Schuback; Wilfried Schupp; Bozena Smith; Hilde Feys

Purpose. To document the prevalence, severity and time course of anxiety and depression in stroke rehabilitation patients in four European countries. Method. At two, four and six months post-stroke, the prevalence and severity of anxiety and depression were determined in 532 consecutively recruited patients, using the Hospital Anxiety and Depression Scale. Time course of prevalence and severity was examined, using Cochran-Q and Friedman-tests, respectively. We identified whether the numbers of anxious/depressed patients at each time point comprised the same individuals. Results. Prevalence of anxiety ranged between 22% and 25%; depression between 24% and 30%. Median severity ranged between 4 and 5. No significant differences between centres occurred (p > 0.05). Prevalence of both disorders was not significantly different over time. Severity of anxiety decreased between four and six months; severity of depression remained stable. About 40% of the patients with initial anxiety remained anxious at six months. Some 11% and 7% of those initially not anxious became anxious at four or six months after stroke, respectively. Depression showed a similar pattern. Conclusions. Despite differences in patient profiles and intensity of rehabilitation, no significant differences occurred between centres in prevalence and severity of both disorders. Anxiety was almost as common as depression and additional patients became anxious/depressed at each time point.


Graefes Archive for Clinical and Experimental Ophthalmology | 1991

Fundus changes in membranoproliferative glomerulonephritis type II

Anita Leys; Yves Vanrenterghem; Baudewiju Van Damme; Bernadette Snyers; Yves Pirson; Mark Leys

A total of 23 patients aged between 11 and 64 years who had biopsy-proven membranoproliferative glomerulonephritis type 11 (dense deposit disease) were studied using fluorescein angiography of the retina. With the exception of two adolescents, all patients exhibited small subretinal nodules that were similar to basal laminar drusen. Subjects with a long history of renal disease displayed more numerous and larger nodules as well as atrophic changes. Four subjects presented with subretinal neovascular membranes.


Journal of Neurology, Neurosurgery, and Psychiatry | 2007

Effect of socioeconomic status on functional and motor recovery after stroke: a European multicentre study

Koen Putman; Liesbet De Wit; Miranda Schoonacker; Ilse Baert; Hilde Beyens; Nadine Brinkmann; Eddy Dejaeger; Anne-Marie De Meyer; Willy De Weerdt; Hilde Feys; Walter Jenni; Christiane Kaske; Mark Leys; Nadina B. Lincoln; Birgit Schuback; Wilfried Schupp; Bozena Smith; Fred Louckx

Background: Previous studies have shown an inverse gradient in socioeconomic status for disability after stroke. However, no distinction has been made between the period in the stroke rehabilitation unit (SRU) and the period after discharge. The purpose of this study was to examine the impact of education and equivalent income on motor and functional recovery for both periods. Methods: 419 consecutive patients were recruited from six SRUs across Europe. The Barthel Index (BI) and Rivermead Motor Assessment (RMA) were measured on admission, at discharge and 6 months after stroke. Ordinal logistic regression models were used, adjusting for case mix. Cumulative odds ratios (OR) were calculated to measure differences in recovery between educational levels and income groups with adjustments for case mix. Results: Patients with a low educational level were less likely to improve on the BI (OR 0.53; 95% CI 0.32 to 0.87) and the RMA arm during inpatient stay (OR 0.54; 95% CI 0.31 to 0.94). For this period, no differences in recovery were found between income groups. After discharge, patients with a low equivalent income were less likely to improve on all three sections of the RMA: gross function (OR 0.20; 95% CI 0.06 to 0.66), leg and trunk (OR 0.22; 95% CI 0.09 to 0.55) and arm (OR 0.30; 95% CI 0.10 to 0.87). No differences were found for education. Conclusions: During inpatient rehabilitation, educational level was a determinant of recovery, while after discharge, equivalent income played an important role. This study suggests that it is important to develop a better understanding of how socioeconomic factors affect the recovery of stroke patients.


Graefes Archive for Clinical and Experimental Ophthalmology | 1990

Subretinal neovascular membranes associated with chronic membranoproliferative glomerulonephritis type II

Anita Leys; Brigitte Michielsen; Mark Leys; Yves Vanrenterghem; Luc Missotten; Baudewijn Van Damme

Subretinal neovascular membranes were observed in three patients with chronic membranoproliferative glomerulonephritis type II (dense deposit disease). The first signs of glomerulonephritis occurred at respective ages of 13, 10 and 10 years; subretinal neovascular membranes were noted at respective ages of 25, 32 and 32 years. All patients had bilateral, widespread retinal pigment epithelial abnormalities. Our findings indicate that subretinal neovascularization is a complication of dense deposit disease. In one patient, the early recognition and laser treatment of an extrafoveal subretinal neovascular membrane prevented further loss of vision.


Applied Physics Letters | 2004

Formation of metallic In in InGaN/GaN multiquantum wells

B. Van Daele; G. Van Tendeloo; Koen Jacobs; Ingrid Moerman; Mark Leys

InxGa1−xN∕GaN light-emitting diode structures with a high In concentration may lose all optical output after capping the active region with a p-type GaN layer. Transmission electron microscopy has been applied to determine the microstructural changes that occur in the quantum-well (QW) region during this capping process. The loss of the optical output is related to a clustering of In into metallic In platelets in the QW region. The properties of these In platelets are described and a formation model is proposed.


Disability and Rehabilitation | 2006

Use of time by physiotherapists and occupational therapists in a stroke rehabilitation unit: A comparison between four European rehabilitation centres

Koen Putman; Liesbet De Wit; Wilfried Schupp; Baert Ilse; Peter Berman; Louise Connell; Eddy Dejaeger; Anna Maria De Meyer; Willy De Weerdt; Hilde Feys; Jenni Walter; Nadina B. Lincoln; Fred Louckx; Martens Anneleen; Schuback Birgit; Bozena Smith; Mark Leys

Purpose. The aim of this study was to compare the time allocated to therapeutic activities (TA) and non-therapeutic activities (NTA) of physiotherapists (PT) and occupational therapists (OT) in stroke rehabilitation units in four European countries. Method. Therapists documented their activities in 15-min periods for two weeks. They recorded: activity, number of patients, number of stroke patients, involvement of other people, location and frequency of each activity. Kruskal-Wallis tests and negative binomial regression models were used to compare activities between professional groups and between units. Results. The average proportion of TA per day ranged between 32.9% and 66.1% and was higher for PT than for OT in each unit. For OT, significant differences emerged between the units in the proportion of time allocated to TA compared to NTA with British OTs spending significantly less time in TA. In the Belgian unit, three times less time was spent on patient-related co-ordination activities (e.g., administration, ward rounds) compared to the British and Swiss units. Conclusions. Time allocation differed between PT and OT and between units, affecting the time available for TA. Further investigation is necessary to study the effect of work organization in stroke rehabilitation units on the efficiency of rehabilitation regimes.

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Koen Putman

Vrije Universiteit Brussel

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Eddy Dejaeger

Katholieke Universiteit Leuven

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Fred Louckx

Vrije Universiteit Brussel

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Hilde Feys

Katholieke Universiteit Leuven

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Liesbet De Wit

Katholieke Universiteit Leuven

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Willy De Weerdt

Katholieke Universiteit Leuven

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Bozena Smith

University of Nottingham

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Ilse Baert

Katholieke Universiteit Leuven

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