Geranne Jiskoot

Ms. Geranne Jiskoot


Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 June 2020 in PLOS ONE
Verified
Journal Article
Open access
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GJGeranne Jiskoot
Geranne Jiskoot
ALAlexandra Dietz de Loos
Alexandra Dietz de Loos
ABAnnemerle Beerthuizen
Annemerle Beerthuizen
RTReinier Timman
Reinier Timman
JBJan Busschbach
Jan Busschbach
JLJoop Laven
Joop Laven
Many women with Polycystic Ovary Syndrome (PCOS) report high depression rates. The relationship between PCOS and these high depression rates is unclear. Two-component lifestyle interventions have revealed short-term effects on depression scores in this group of women. In general, 3-component interventions including diet, exercise, and cognitive behavioral therapy (CBT) are more effective in the long-term to improve emotional well-being. This has not yet been studied in women with PCOS. This study examined the effect of 20 CBT lifestyle (LS) sessions combined with a healthy diet and physical therapy with or without 9 months additional feedback through Short Message Service (SMS) via mobile phone, compared to care as usual (CAU, involving advice to lose weight). In this secondary analysis, 155 women with PCOS and a BMI above 25 kg/m2 were eligible. Depression scores decreased significantly in the LS programme compared to CAU (P = 0.045). In both the LS programme without SMS (P = 0.036) and the LS programme with SMS (P = 0.011) depression scores decreased while no change was observed in CAU (P = 0.875). Self-esteem scores improved significantly in the LS programme compared to CAU (P = 0.027). No differences in body image scores were observed in LS participants compared to CAU (P = 0.087), although body image improved significantly in both the LS without SMS (P = 0.001) and with SMS (P = 0.008) study arms. We found no significant mediating role by androgens in the relationship between LS participants and emotional well-being. Only weight-loss mediated the relationship between LS and self-esteem. To conclude, a three-component lifestyle intervention programme with or without additional SMS resulted in significant improvements in depression and self-esteem compared to CAU, in women with PCOS, obesity, and a wish to achieve a pregnancy. Testosterone, androstenedione, DHEA, insulin, HOMA-IR, and cortisol did not mediate this effect. Weight loss mediated the effects on self-esteem but not on depression and body-image. This suggests that lifestyle treatment independent of weight loss can reduce depression and body-image, but both lifestyle treatment and weight loss can improve self-esteem. Thus, a three-component lifestyle intervention based on CBT could prove successful in improving mood in women with PCOS who are overweight or obese and attempting to become pregnant.

23 September 2020 in Obesity
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Journal Article
Open access
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GJGeranne Jiskoot
Geranne Jiskoot
RTReinier Timman
Reinier Timman
ABAnnemerle Beerthuizen
Annemerle Beerthuizen
ALAlexandra Dietz de Loos
Alexandra Dietz de Loos
JBJan Busschbach
Jan Busschbach
JLJoop Laven
Joop Laven
Objective: Long‐term weight loss is important and difficult to achieve for many women with polycystic ovary syndrome (PCOS). Lifestyle interventions (LS) in PCOS have shown moderate short‐term effects. Three‐component LS that combine nutrition advice, exercise, and cognitive behavioral therapy have not been tested in long‐term interventions.Methods: Women (N = 183) with PCOS who were trying to conceive and had BMI > 25 kg/m2 were assigned to 20 group sessions of cognitive behavioral therapy combined with nutrition advice and exercise (LS with or without Short Message Service [SMS] via mobile phone) or care as usual (CAU).Results: More weight loss was observed in LS than in CAU (P < 0.001). Adding SMS was even more effective (P = 0.017). In CAU, 13 of 60 (21.8%) succeeded in achieving a 5% weight loss, as did 32 of 60 (52.8%) in LS without SMS and 54 of 63 (85.7%) in LS with SMS. The odds of achieving a 5% weight loss were 7.0 (P < 0.001) in LS compared with CAU. More than 18 of 60 (29.0%) of the women in CAU gained weight versus 5 of 60 (8.5%) and 2 of 63 (3.1%) in LS without or with SMS, respectively. The overall dropout rate was 116 of 183 (63.4%).Conclusions: A three‐component LS program resulted in reasonable weight loss in women with PCOS. Adding SMS resulted in more weight loss.

6 March 2017 in Reproductive Health
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Journal Article
Open access
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GJGeranne Jiskoot
Geranne Jiskoot
SBS.H. Benneheij
S.H. Benneheij
ABA. Beerthuizen
A. Beerthuizen
JNJ.E. de Niet
J.E. de Niet
CKC. de Klerk
C. de Klerk
JLJoop S.E. Laven
Joop S.E. Laven
Obesity in women with polycystic ovary syndrome (PCOS) negatively affects all clinical features, and a 5 to 10% weight loss has shown promising results on reproductive, metabolic and psychological level. Incorporating a healthy diet, increasing physical activity and changing dysfunctional thought patterns in women with PCOS are key points in losing weight. The biggest challenge in weight management programs is to achieve a reasonable and sustainable weight loss. The aim of this study is to explore whether Cognitive Behavioural Therapy (CBT) by a mental health professional, working in a multidisciplinary team with a dietician and a physical therapist (a three-component intervention), is more effective for weight loss in the long term, within 12 months. We will also explore whether mobile phone applications are effective in supporting behavioural change and sustainable weight loss. The present study is a longitudinal randomized controlled trial (RCT) to study the effectiveness of a three-component 1-year cognitive-behavioural lifestyle intervention in overweight/obese women with PCOS. A total of 210 participants are randomly assigned to three groups: 1) CBT provided by the multidisciplinary team or; 2) CBT provided by the multidisciplinary team and Short Message Service (SMS) or; 3) usual care: encourage weight loss through publicly available services (control group). The primary aim of the 12-month intervention is to explore whether a three-component 1-year cognitive-behavioural lifestyle intervention is effective to decrease weight, when compared to usual care. Secondary outcomes include: the effect of the intervention on the PCOS phenotype, waist circumference, waist to hip ratio, ovulation rates, total testosterone, SHBG, free androgen index (FAI), AMH, hirsutism, acne, fasting glucose, blood pressure and all psychological parameters. Additionally, we assessed time to pregnancy, ongoing pregnancies, clinical pregnancies, miscarriages and birth weight. All outcome variables are measured at the start of the study, and again at 3 months, 6 months, nine months and 12 months. We expect that CBT provided by a multidisciplinary team, especially combined with SMS, is effective in developing a healthy lifestyle and achieving a long-term weight loss in women with PCOS. Losing 5– 10% body weight improves various PCOS characteristics. Consequently, we expect to show that CBT provided by a multidisciplinary team improves reproductive and metabolic outcomes, as well as quality of life, while at the same time being cost-effective. Registered at the Netherlands National Trial Register with number NTR2450 on August 2nd, 2010.

11 May 2022 in Reproductive BioMedicine Online
Verified
Journal Article
Open access
GJGeranne Jiskoot
Geranne Jiskoot
AKAnne-Lotte van der Kooi
Anne-Lotte van der Kooi
JBJan Busschbach
Jan Busschbach
JLJoop Laven
Joop Laven
ABAnnemerle Beerthuizen
Annemerle Beerthuizen
Polycystic ovary syndrome (PCOS) is a common endocrine disorder with physical and psychological complaints, especially high depression scores. Cognitive behavioural therapy (CBT) is the first-line psychological treatment for depression. The objective of this study was to examine the effect of different types of CBT interventions and the effects on depression scores in women with PCOS. A literature search was performed in six databases up to July 2020. Studies published in English, in which depression scores were compared between groups during a CBT intervention in women with PCOS, were included. A total of 4854 studies were identified, of which eight studies were included in the systematic review and five in the meta-analysis. CBT ranged from 8 to 52 weeks and involved between 8 and 20 sessions. An overall Cohen's d effect size of 1.02 (95% confidence interval 0.02-2.02) was found in favour of CBT compared with standard care. To conclude, most psychological interventions applying CBT are effective in lowering depression scores in women with PCOS. These results should be interpreted with caution due to methodological differences and quality of the studies. More clinical trials are needed to assess how many sessions of CBT are necessary to treat depression in women with PCOS.

29 December 2022 in International Journal of Endocrinology and Metabolism
Verified
Journal Article
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MMMostafa Mohseni
Mostafa Mohseni
SKSusanne Kuckuck
Susanne Kuckuck
RMRenate E. H. Meeusen
Renate E. H. Meeusen
GJGeranne Jiskoot
Geranne Jiskoot
RLRobin Lengton
Robin Lengton
ERElisabeth F. C. Van Rossum
Elisabeth F. C. Van Rossum
Background: Obesity is a multifactorial, chronic, progressive disease associated with decreased health-related quality of life, comorbidities, and increased mortality risk. Lifestyle interventions, focusing on dietetics, physical exercise, and behavioral therapy, are a cornerstone of therapy. Despite this very multidisciplinary treatment approach, the definition of treatment success is often based only on a weight loss of ≥ 5%. However, the heterogeneous nature of obesity may necessitate a more comprehensive approach to assessing treatment effects. Objectives: Here, we describe changes in physiological, psychological, and behavioral health after a multidisciplinary combined lifestyle intervention (CLI). Additionally, we investigated whether these changes were related to weight loss. Methods: This prospective observational longitudinal study comprised 96 adults with obesity (73 women, 81 Caucasian) participating in a CLI at the Obesity Center CGG, Erasmus University Medical Center, Rotterdam, the Netherlands. The 1.5-year intervention comprised multidisciplinary professional guidance towards a healthy diet, increased physical activity, and included cognitive behavioral therapy. Physiological health outcomes, psychological well-being, eating behavior, and physical activity were assessed after ten weeks and 1.5 years and compared to baseline. Results: An average of 5.2% weight loss (-6.0 kg) was accompanied by a mean 9.8% decrease in fat mass (-5.9 kg; both P < 0.001) and significant improvements in metabolism, hormonal status, and immune parameters (all P < 0.05). Moreover, we observed decreased psychopathology, increased quality of life, and decreased disordered eating (all P < 0.05). Weight loss correlated with most metabolic changes (all P < 0.05) but not with most psychological/behavioral changes. Conclusions: Combined lifestyle intervention in patients with obesity was accompanied by significant improvements in body weight and body composition along with cardiometabolic, endocrine, immunological, psychological, and behavioral improvements. Interestingly, most changes in psychological and behavioral health occurred independently of weight loss. Obesity treatment success should be evaluated based on a combination of physical and patient-reported outcomes rather than weight loss alone.

17 May 2022 in Journal of Eating Disorders
Verified
Journal Article
Open access
PDF file
GJGeranne Jiskoot
Geranne Jiskoot
ALAlexandra Dietz de Loos
Alexandra Dietz de Loos
RTReinier Timman
Reinier Timman
ABAnnemerle Beerthuizen
Annemerle Beerthuizen
JLJoop Laven
Joop Laven
JBJan Busschbach
Jan Busschbach
Background: Eating behaviors like emotional eating, external eating and restrained eating play an important role in weight gain and weight loss in the general population. Improvements in eating behavior are important for long-term weight. This has not yet been studied in women with Polycystic Ovary Syndrome (PCOS). The aim of this study is to examine if a three-component lifestyle intervention (LI) is effective for improving disordered eating behavior in women with PCOS.Methods: Women diagnosed with PCOS (N = 183), with a body mass index (BMI) > 25 kg/m2and trying to achieve a pregnancy were either assigned to 1 year of 20 group sessions of cognitive behavioral therapy (CBT) combined with nutritional advice and exercise with or without additional feedback through Short Message Service (SMS) or Care As Usual (CAU), which includes the advice to lose weight using publicly available services.Results: The Eating Disorder Examination Questionnaire (EDEQ) scores worsened in CAU (47.5%) and improved in the LI (4.2%) at 12 months. The difference between the LI and CAU was significant (P = 0.007) and resulted in a medium to large effect size (Cohen’s d: − 0.72). No significant differences were observed in EDEQ scores between LI with SMS compared to LI without SMS (Cohen’s d: 0.28;P = 0.399). Also, weight loss did not mediate the changes in eating behavior. An overall completion rate of 67/183 (36.6%) was observed.Conclusions: A three-component CBT lifestyle program resulted in significant improvements in disordered eating behavior compared to CAU. Changes in disordered eating behavior are important for long-term weight loss and mental health.Trial registration: NTR, NTR2450. Registered 2 August 2010,https://www.trialregister.nl/trial/2344