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Featured researches published by Joke Fleer.


Diabetes Care | 2014

Individual Mindfulness-Based Cognitive Therapy and Cognitive Behavior Therapy for Treating Depressive Symptoms in Patients With Diabetes: Results of a Randomized Controlled Trial

K. Annika Tovote; Joke Fleer; Evelien Snippe; Anita C.T.M. Peeters; Paul M. G. Emmelkamp; Robbert Sanderman; Thera P. Links; Maya J. Schroevers

OBJECTIVE Depression is a common comorbidity of diabetes, undesirably affecting patients’ physical and mental functioning. Psychological interventions are effective treatments for depression in the general population as well as in patients with a chronic disease. The aim of this study was to assess the efficacy of individual mindfulness-based cognitive therapy (MBCT) and individual cognitive behavior therapy (CBT) in comparison with a waiting-list control condition for treating depressive symptoms in adults with type 1 or type 2 diabetes. RESEARCH DESIGN AND METHODS In this randomized controlled trial, 94 outpatients with diabetes and comorbid depressive symptoms (i.e., Beck Depression Inventory-II [BDI-II] ≥14) were randomized to MBCT (n = 31), CBT (n = 32), or waiting list (n = 31). All participants completed written questionnaires and interviews at pre- and postmeasurement (3 months later). Primary outcome measure was severity of depressive symptoms (BDI-II and Toronto Hamilton Depression Rating Scale). Anxiety (Generalized Anxiety Disorder 7), well-being (Well-Being Index), diabetes-related distress (Problem Areas In Diabetes), and HbA1c levels were assessed as secondary outcomes. RESULTS Results showed that participants receiving MBCT and CBT reported significantly greater reductions in depressive symptoms compared with patients in the waiting-list control condition (respectively, P = 0.004 and P < 0.001; d = 0.80 and 1.00; clinically relevant improvement 26% and 29% vs. 4%). Both interventions also had significant positive effects on anxiety, well-being, and diabetes-related distress. No significant effect was found on HbA1c values. CONCLUSIONS Both individual MBCT and CBT are effective in improving a range of psychological symptoms in individuals with type 1 and type 2 diabetes.


Supportive Care in Cancer | 2004

Quality of life of survivors of testicular germ cell cancer: a review of the literature.

Joke Fleer; Harald J. Hoekstra; Dirk Sleijfer; Jehm Hoekstra-Weebers

Goals of workTesticular cancer (TC) affects young men in the prime of life. The excellent prognosis and an increasing incidence have led to a growing number of testicular cancer survivors (TCSs). The aim of this review was to summarize and discuss research findings on the quality of life (QOL) of TCSs in terms of physical, psychological, and social well-being.Patients and methodsLiterature databases were used to identify studies published between 1980 and 2003. A quality assessment using methodological and treatment-related criteria was performed to distinguish stronger- from poorer-quality studies.Main resultsTwenty-three studies met the inclusion criteria. Quality assessment showed that seven studies were qualitatively stronger. The majority of TCSs in both stronger and poorer quality studies reported a good QOL. Prospective and retrospective studies showed that QOL after completion of treatment increased and negative consequences of TC on life decreased compared to the situation directly after diagnosis. The stronger-quality studies reported mainly on physical and psychological well-being but did not examine social well-being and the impact of treatment-related characteristics comprehensively.ConclusionsBoth stronger- and poorer-quality studies indicate that the majority of TCSs experience a good QOL, but the shortcomings on both the methodological and content level prevent us from drawing such a conclusion. Additional research with strong designs is needed to gain clearer insight into the QOL of TCSs as a group and of individuals at risk for physical, psychological, and social problems.


Supportive Care in Cancer | 2006

Quality of life of testicular cancer survivors and the relationship with sociodemographics, cancer-related variables, and life events

Joke Fleer; Harald J. Hoekstra; Dirk Sleijfer; Marrit A. Tuinman; E. C. Klip; Jehm Hoekstra-Weebers

Goals of workThe aim of this study was to (1) assess the quality of life (QoL) of testicular cancer survivors (TCSs) by comparing them to a reference group; (2) investigate the relationship between the QoL of TCSs and sociodemographics, cancer-related variables, and life events; and (3) identify TCSs at risk for an impaired QoL.Patients and methodsOf the TCSs approached, 50% (n=354) participated and completed a generic QoL questionnaire (RAND-36) once. Time since completion of treatment varied from 3 months to 24 years.Main results(1) TCSs had significantly higher mean scores on the subscales physical functioning (p=0.02) and pain (p=0.001), but lower mean scores on mental health (p=0.04) and vitality (p<0.001) than a reference group of men. The effect sizes of these differences were small to insignificant. (2) Employment status and chronic disease were the main correlates of the QoL of TCSs. Age, negative life events, type of treatment, and the experience of a second cancer event were moderately associated with some subscales as well. (3) The joint burden of unemployment and a chronic disease was the strongest predictor for an impaired functioning.ConclusionsOn a group level, TCSs experience a good QoL, but a small group appeared to be at risk for an impaired functioning, namely, those who were unemployed and had a chronic disease. The variance explained by the variables studied was low, indicating that more important predictors remain to be identified.


Supportive Care in Cancer | 2005

Marital and sexual satisfaction in testicular cancer survivors and their spouses

Marrit A. Tuinman; Joke Fleer; Dirk Sleijfer; Harald J. Hoekstra; Josette E. H. M. Hoekstra-Weebers

GoalTo compare marital and sexual satisfaction of men who survived testicular cancer (TC) and their spouses to a reference group, and to compare marital and sexual satisfaction of couples who had a relationship at time of diagnosis (couples during TC) to couples who developed a relationship after completion of treatment (couples after TC).Patients and methodsTwo hundred and nineteen couples during TC and 40 couples after TC completed the Maudsley Marital Questionnaire, a validated instrument to measure marital and sexual satisfaction.ResultsSurvivors and spouses of both couple groups reported similar marital satisfaction as men and women of the reference group. Survivors (t=2.9, p<0.01) and spouses (t=2.9, p<0.01) of couples during TC and survivors of couples after TC (t=1.9, p=0.05) reported less sexual satisfaction than the reference groups. Survivors of couples after TC reported less sexual satisfaction than survivors of couples during TC (F=4.0, p<0.05). Correlations between sexual satisfaction of survivors and spouses in couples during TC (r=0.76, p<0.001) and couples after TC (r=0.77, p<0.001) were high.ConclusionTesticular cancer did not appear to have a negative effect on marital satisfaction in couples during TC, although TC survivors and their spouses reported less sexual satisfaction than men and women of the reference group. Survivors who developed a relationship after completion of treatment seemed to form a vulnerable group: their sexual satisfaction was lower than that of men in the reference group and of TC survivors with a longer relationship. Besides that, they more often reported marital problems than their spouses did.


Psycho-oncology | 2010

Sexual function, depressive symptoms and marital status in nonseminoma testicular cancer patients: a longitudinal study.

Marrit A. Tuinman; Harald J. Hoekstra; Damon J. Vidrine; Ellen R. Gritz; Dirk Sleijfer; Joke Fleer; Josette E. H. M. Hoekstra-Weebers

Goal: To longitudinally investigate sexual functioning in testicular cancer patients during the first year, and examine the effect of relationship status (with a partner or single) and depressive symptoms on sexual functioning.


Quality of Life Research | 2006

The role of meaning in the prediction of psychosocial well-being of testicular cancer survivors

Joke Fleer; Hans Hoekstra; Dirk Sleijfer; Marrit A. Tuinman; Jehm Hoekstra-Weebers

SummaryStressful life events, such as cancer, may threaten the belief that life is meaningful and this may have a negative effect on well-being. This study aimed at: (1) examining meaning in testicular cancer survivors (TCSs); (2) changes in outlook on life after testicular cancer (TC); (3) the contribution of meaning in the prediction of psychosocial well-being and cancer-related distress. A total of 354 TCSs completed relevant questionnaires. Results showed that: (1) TCSs experience their lives as meaningful; (2) most TCSs (60%) report a more positive outlook on life since TC; (3) meaning is the most important predictor for psychosocial well-being, but its relationship with cancer-related distress is weak. These results indicate that the cancer experience did not (permanently) disrupt the sense of meaning in TCSs. Furthermore, results confirm the idea that a sense of meaning has a positive effect on psychosocial well-being. Meaning appeared to have little effect on cancer-related distress. However, previous research has shown that this relationship may be too complex to unravel with a cross-sectional design. Therefore, it is suggested to further investigate the underlying interacting mechanisms between meaning and cancer-related distress.


European Journal of Cardiovascular Nursing | 2011

The advisory brought to practice; routine screening on depression (and anxiety) in coronary heart disease; Consequences and implications

Marie Louise Luttik; Trijntje Jaarsma; Robbert Sanderman; Joke Fleer

Introduction: Following the evidence, the American Heart Association recently published a Science Advisory with the recommendation that patients with Coronary Heart Disease (CHD) should be screened for depressive symptoms and depression. Also the Heart Failure Guidelines recommend routine screening for depressive symptoms. Screening for anxiety was not included in these recommendations, despite findings in literature suggesting that cardiac patients are at risk for high levels of anxiety. Objective: The aim of the current study is to obtain a realistic estimation of the consequences and implications of this advice for clinical practice. Method: Data on anxiety, and depression, need for help, demographics and disease related variables were collected in a cross-sectional study within a 2-month period (July–August 2008) at the cardiac outpatient clinic of the University Medical Center Groningen (The Netherlands). Patients: Data of 217 patients were analyzed, mean age was 58 years (±16) and 62% of the respondents were male. Results: Of 217 patients, 26% indicated to have depressive symptoms and 42% indicated elevated levels of anxiety. About 35–50% of these patients indicated a moderate to high need for help. The prevalence of anxiety and depression was mainly associated with demographic factors and the occurrence of stressful life events. Conclusion: Routine screening will put an increased demand on psychosocial diagnostics and treatment, therefore the availability of professionals should be guaranteed in advance.


Diabetic Medicine | 2013

Screening for depression and diabetes-related distress in a diabetes outpatient clinic

Joke Fleer; K. A. Tovote; Joost C. Keers; Thera P. Links; Robbert Sanderman; James C. Coyne; Maya J. Schroevers

Aims  To investigate: (1) the willingness of patients with diabetes to participate in a screening programme; (2) the extent to which patients with diabetes who screen positive endorse need for psychosocial care; (3) the rate of referral to psychosocial care during screening vs. usual care.


Psychology & Health | 2010

The adaptive effect of personal control when facing breast cancer: Cognitive and behavioural mediators

Inge Henselmans; Joke Fleer; de Jakob Vries; Peter C. Baas; Robbert Sanderman; Adelita V. Ranchor

This prospective study examines the cognitive and behavioural mediators of the relation between personal control and the initial response to a breast cancer diagnosis as well as subsequent psychological adjustment. A total of 143 patients participated immediately after diagnosis (T1), after surgery (T2) and 2 months after the end of treatment (T3), of whom 92 also completed a questionnaire pre-diagnosis (T0). The buffering effect of personal control on psychological distress shortly after diagnosis was mediated by cancer-specific cognitions, i.e. threat appraisal and coping self-efficacy. Moreover, a strong sense of personal control predicted lower levels of anxiety 2 months after the end of treatment, but was unrelated to distress at T3. The adaptive effect on anxiety was mediated by threat appraisal and active engagement in social life after surgery, but not by active patient participation or coping self-efficacy. These results confirm and explain the adaptive effect of control. Apparently, women with a low sense of control appraise cancer and their personal coping skills more negatively, which makes them vulnerable to distress in response to diagnosis. Furthermore, women with a strong sense of control might regulate anxiety by remaining engaged in social life.


British Journal of Health Psychology | 2013

Dispositional optimism in adolescents with cancer: Differential associations of optimism and pessimism with positive and negative aspects of well-being

Esther Sulkers; Joke Fleer; Petrie F. Roodbol; Willem A. Kamps; Wim J. E. Tissing; Robbert Sanderman

OBJECTIVES Dispositional optimism is often considered to be a unidimensional construct. Recent studies suggest, however, that optimism and pessimism are separate dimensions. In this study we investigated two issues. First, the levels of optimism and pessimism in adolescents with cancer compared with healthy controls and second, the individual effects of optimism and pessimism on concurrent and longitudinal well-being. DESIGN A matched case-control design was used to examine whether adolescents with cancer and healthy adolescents differed with regard to optimism and pessimism. The second part of the study was employed in a prospective design with assessments in the patient group at 3 and 6 months post-diagnosis. METHODS Thirty-three adolescents with cancer (3 months post-diagnosis) and 66 matched controls completed a measure on dispositional optimism (i.e., optimism and pessimism). In addition, patients completed measures on positive and negative aspects of well-being at 3 and 6 months post-diagnosis. RESULTS Although adolescents with cancer were not more optimistic than their healthy peers, they were significantly less pessimistic. Zero order and semi-partial correlations showed that optimism and pessimism are related to different aspects of well-being. Specifically, we found a cohesive pattern in which optimism predicts positive aspects and pessimism negative aspects of well-being. CONCLUSIONS The high levels of overall optimism often found in patients with cancer might in fact result from low pessimism instead of high optimism. Furthermore, as our study shows that optimism and pessimism are differentially associated with aspects of well-being, it provides strong support for the bidimensionality of dispositional optimism.

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Maya J. Schroevers

University Medical Center Groningen

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Adelita V. Ranchor

University Medical Center Groningen

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Harald J. Hoekstra

University Medical Center Groningen

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Dirk Sleijfer

University Medical Center Groningen

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Marrit A. Tuinman

University Medical Center Groningen

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Moniek Janse

University Medical Center Groningen

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Evelien Snippe

University Medical Center Groningen

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Esther Sulkers

University Medical Center Groningen

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