Methodology of the DCCSS later fatigue study: a model to investigate chronic fatigue in long-term survivors of childhood cancer

Chronic fatigue in childhood cancer survivors is associated with lifestyle and psychosocial factors; a DCCSS LATER study

BACKGROUND

The purpose of this study was to determine factors associated with chronic fatigue (CF) in childhood cancer survivors (CCS).

PATIENTS AND METHODS

Participants were included from the Dutch Childhood Cancer Survivor Study (DCCSS) LATER cohort, a nationwide cohort of CCS (≥5 years after diagnosis) and siblings as controls. Fatigue severity was assessed with the 'fatigue severity subscale' of the Checklist Individual Strength ('CIS-fatigue'). CF was defined as scoring ≥35 on the 'CIS-fatigue' and having fatigue symptoms for ≥6 months. Twenty-four parameters were assessed, categorized into assumed fatigue triggering, maintaining and moderating factors. Multivariable logistic regression analyses were carried out to investigate the association of these factors with CF.

RESULTS

A total of 1927 CCS participated in the study (40.7% of invited cohort), of whom 23.6% reported CF (compared with 15.6% in sibling controls, P < 0.001). The following factors were associated with CF: obesity [versus healthy weight, odds ratio (OR) 1.93; 95% confidence interval (CI) 1.30-2.87], moderate physical inactivity (versus physical active, OR 2.36; 95% CI 1.67-3.34), poor sleep (yes versus no, OR 2.03; 95% CI 1.54-2.68), (sub)clinical anxiety (yes versus no, OR 1.55; 95% CI 1.10-2.19), (sub)clinical depression (yes versus no, OR 2.07; 95% CI 1.20-3.59), pain (continuous, OR 1.49; 95% CI 1.33-1.66), self-esteem (continuous, OR 0.95; 95% CI 0.92-0.98), helplessness (continuous, OR 1.13; 95% CI 1.08-1.19), social functioning (continuous, OR 0.98; 95% CI 0.97-0.99) and female sex (versus male sex, OR 1.79; 95% CI 1.36-2.37).

CONCLUSION

CF is a prevalent symptom in CCS that is associated with several assumed maintaining factors, with lifestyle and psychosocial factors being the most prominent. These are modifiable factors and may therefore be beneficial to prevent or reduce CF in CCS.

Cancer-related fatigue: scoping review to synthesize a definition for childhood cancer survivors

CONTEXT

There is no universal definition of cancer-related fatigue (CRF) specific to childhood cancer survivors, despite this population facing unique long-term side effects from their cancer. We aimed to synthesize and combine existing definitions of CRF specific to this context to inform on the necessity of a panel of experts to formulate a new definition of CRF for childhood cancer survivors.

METHODS

The literature search was performed in various databases. Titles, abstracts, and keywords were screened by two researchers to confirm eligibility. The data extraction process was performed by two researchers. Our search was conducted in various databases.

RESULTS

Thirty articles were included in the qualitative analysis. Two coders reached consensus on 14 codes. The thematization process produced 4 themes: frequency, context, attributes, and consequences of CRF. These themes were used to synthesize a definition of CRF, as follows: "In childhood cancer survivors, cancer-related fatigue is a common late effect of cancer and cancer treatments. It is characterized by a subjective, persistent, and multidimensional experience that differs from normal fatigue in the physical, emotional, and/or cognitive spheres. Cancer-related fatigue may have a variety of negative consequences including a reduced quality of life and level of functioning, a lack of vigor, work difficulties, relationship issues, and emotional distress."

CONCLUSION

A definition of CRF applicable to childhood cancer survivors is timely to organize research efforts and design appropriate interventions. The proposed definition is a first step towards the formulation of a new definition of CRF specific to childhood cancer survivors by experts.

Associations between cancer-related distress and fatigue in childhood cancer survivors: A longitudinal study

BACKGROUND AND AIMS

A chronic feeling of fatigue occurs in up to 85% of childhood cancer survivors (CCS). This phenomenon has a detrimental effect on quality of life, reintegration in daily life activities and psychosocial functioning of the patient. Therefore, it is important to elucidate potential individual risk and protective factors.

METHODS

CCS who were treated in the University Hospital of Leuven, completed two annual questionnaires on cancer-related distress (fear of cancer recurrence and post-traumatic stress, resilience and fatigue). Associations between distress and fatigue levels were examined by performing cross-lagged panel analyses. Resilience was included as a potential moderator. These models included all within-time associations, stability paths, and cross-lagged paths. Gender and time since diagnosis were included as covariates.

RESULTS

In total, 110 CCS participated in this study, aged 14-25 years (average time since diagnosis 12.2 years; 41.8% boys; diagnosed with leukemia/lymphoma [49%], solid tumor [15%], brain tumor [16%] or other [20%]). Fear of cancer recurrence and post-traumatic stress at baseline positively predicted fatigue 1 year later. Cross-lagged panel analyses showed that resilience did not buffer the effect of fear of cancer recurrence on fatigue, in contrary to our expectations. Stability coefficients were high for all study variables.

CONCLUSION

This study indicates associations between cancer-related distress (fear of cancer recurrence and post-traumatic stress), resilience and cancer-related fatigue over time in CCS. Interventions to improve fatigue levels could be focusing on both tackling cancer-related distress, while improving resilience levels as well.

Cancer-related fatigue in childhood cancer survivors: A systematic scoping review on contributors of fatigue and how they are targeted by non-pharmacological interventions

OBJECTIVES

We aimed to identify contributors to cancer-related fatigue (CRF), explore non-pharmacological interventions addressing CRF, and highlight which contributors were targeted by these interventions in childhood cancer survivors.

METHODS

We performed a search in various databases and used the PRISMA-ScR checklist. Findings were synthesized in various different tables and figures in accordance with our objectives.

RESULTS

We included 49 articles in this systematic scoping review. We identified 59 significant contributors. Depression and physical activity level were some of the most studied significant contributors. Ten interventional studies were identified (e.g., yoga, physical activity intervention) that addressed 6 contributors (e.g., physical activity level).

DISCUSSION

This review is the first to describe and relate contributors and non-pharmacological interventions targeting CRF in childhood cancer survivors. Important clinical implications could be derived from the variety of factors explaining CRF and how it is currently addressed.

Insomnia Symptoms and Daytime Fatigue Co-Occurrence in Adolescent and Young Adult Childhood Cancer Patients in Follow-Up after Treatment: Prevalence and Associated Risk Factors

Insomnia symptoms and daytime fatigue commonly occur in pediatric oncology, which significantly impact physical and psychosocial health. This study evaluated the prevalence of insomnia only, daytime fatigue only, the co-occurrence of insomnia−daytime fatigue symptoms, and associated risk factors. Childhood cancer patients (n = 565, 12−26 years old, ≥6 months after treatment) participated in a national, cross-sectional questionnaire study, measuring insomnia symptoms (ISI; Insomnia Severity Index) and daytime fatigue (single item). Prevalence rates of insomnia and/or daytime fatigue subgroups and ISI severity ranges were calculated. Multinomial regression models were applied to assess risk factors. Most patients reported no insomnia symptoms or daytime fatigue (61.8%). In the 38.2% of patients who had symptoms, 48.1% reported insomnia and daytime fatigue, 34.7% insomnia only, and 17.1% daytime fatigue only. Insomnia scores were higher in patients with insomnia−daytime fatigue compared to insomnia only (p < 0.001). Risk factors that emerged were: female sex and co-morbidities (all), shorter time after treatment and bedtime gaming (insomnia only), young adulthood (insomnia−fatigue/fatigue only), needing someone else to fall asleep and inconsistent wake times (both insomnia groups), lower educational level and consistent bedtimes (insomnia−fatigue). Insomnia symptoms and daytime fatigue are common and often co-occur. While current fatigue guidelines do not include insomnia symptoms, healthcare providers should inquire about insomnia as this potentially provides additional options for treatment and prevention.

The Impact of Cancer-Related Fatigue on HRQOL in Survivors of Childhood Cancer: A DCCSS LATER Study

Simple Summary

Survivors of childhood cancer have an increased risk to experience symptoms of severe and persistent fatigue. We studied how fatigue might affect the health-related quality of life of these survivors. Questionnaire items asking about a broad range of daily life aspects were compared between fatigued survivors, survivors without fatigue and the general Dutch population. A total of eleven aspects were studied which were all negatively affected by fatigue, with the largest impact seen for Vitality (how much energy does a person have), General Health (perception of current and future health) and Role Limitations (work-related activities). Results show the negative impact fatigue can have on the daily lives of survivors and why it is important to treat fatigue adequately.

Abstract

Background: Early detection and management of late effects of treatment and their impact on health-related quality of life (HRQOL) has become a key goal of childhood cancer survivorship care. One of the most prevalent late effects is chronic fatigue (CF). The current study aimed to investigate the association between CF and HRQOL in a nationwide cohort of CCS. Methods: Participants were included from the Dutch Childhood Cancer Survivor Study (DCCSS) LATER cohort, a nationwide cohort of CCS. Participants completed the Checklist Individual Strength (CIS) to indicate CF (CIS fatigue severity subscale ≥ 35 and duration of symptoms ≥6 months) and the Short Form-36 (SF-36) and TNO (Netherlands Organization for Applied Scientific Research) and AZL (Leiden University Medical Centre) Adult’s Health-Related Quality of Life questionnaire (TAAQOL) as measures for HRQOL. Differences in mean HRQOL domain scores between CF and non-CF participants were investigated using independent samples t-tests and ANCOVA to adjust for age and sex. The association between CF and impaired HRQOL (scoring ≥ 2 SD below the population norm) was investigated using logistic regression analyses, adjusting for confounders. Results: A total of 1695 participants were included in the study. Mean HRQOL domain scores were significantly lower in participants with CF. In addition, CF was associated with impaired HRQOL on all of the domains (except physical functioning) with adjusted odds ratios ranging from 2.1 (95% CI 1.3–3.4; sexuality domain) to 30.4 (95% CI 16.4–56.2; vitality domain). Conclusions: CF is associated with impaired HRQOL, urging for the screening and regular monitoring of fatigue, and developing possible preventative programs and interventions.

Assessing fatigue in childhood cancer survivors: Psychometric properties of the Checklist Individual Strength and the Short Fatigue Questionnaire--a DCCSS LATER study

Background

Fatigue is often reported by patients with childhood cancer both during and after cancer treatment. Several instruments to measure fatigue exist, although none are specifically validated for use in childhood cancer survivors (CCS). The aim of the current study was to present norm values and psychometric properties of the Checklist Individual Strength (CIS) and Short Fatigue Questionnaire (SFQ) in a nationwide cohort of CCS.

Methods

In total, 2073 participants were included from the Dutch Childhood Cancer Survivor Study (DCCSS) LATER cohort. Normative data, construct validity, structural validity, and internal consistency were calculated for the CIS and SFQ. In addition, reliability and a cutoff score to indicate severe fatigue were determined for the SFQ.

Results

Correlations between CIS/SFQ and vitality measures asking about fatigue were high (>0.8). Correlations between CIS/SFQ and measures of different constructs (sleep, depressive emotions, and role functioning emotional) were moderate (0.4–0.6). Confirmatory factor analysis resulted in a four‐factor solution for the CIS and a one‐factor solution for the SFQ with Cronbach's alpha for each (sub)scale showing good to excellent values (>0.8). Test–retest reliability of the SFQ was adequate (Pearson's correlation = 0.88; ICC = 0.946; weighted Cohen's kappa item scores ranged 0.31–0.50) and a cut‐off score of 18 showed good sensitivity and specificity scores (92.6% and 91.3%, respectively).

Conclusion

The current study shows that the SFQ is a good instrument to screen for severe fatigue in CCS. The CIS can be used as a tool to assess the multiple fatigue dimensions in CCS.