Veerle Marieke Wintraecken

Background: The non-inferiority randomized controlled trial BOOG 2013-08 investigates the oncological safety and impact on health-related quality of life (HRQoL) of sentinel lymph node biopsy (SNLB) omission in cT1–2 N0 breast cancer. The primary aim of the present study was to compare patient-reported arm function and HRQoL up to 3 years after study inclusion in cT1–2 N0 patients with breast cancer undergoing breast-conserving surgery (BCS) with or without SLNB. The secondary aim was to explore the association between personality traits ‘trait anxiety’ and ‘neuroticism’, and perceived arm function and HRQoL. Methods: A total of 1733 women with unilateral cT1–2 N0 invasive breast cancer treated with BCS with or without SLNB were included. The primary outcomes of arm function (assessed using the Lymphoedema Functioning, Disability, and Health Questionnaire) and HRQoL (assessed using the European Organisation for Research and Treatment of Cancer QLQ-C30 and QLQ-BR-23 questionnaires) were analysed. Results: Analyses included 821 patients (383 with SLNB and 438 without SLNB). Those in the SLNB group experienced a slight, temporary decline in arm function (P < 0.025) and reported more HRQoL arm and breast symptoms (P < 0.049). High trait anxiety or neuroticism was associated with significant poorer arm function and lower HRQoL. Conclusion: SLNB slightly reduced arm function, temporarily affecting HRQoL arm and breast symptoms. Neuroticism significantly negatively impacted arm function and HRQoL. Measuring and stratifying for personality traits is crucial for interpreting patient-reported outcomes and to identify patients needing additional support after surgery. Registration number: NCT02271828 (http://www.clinicaltrials.gov).

Background: Quality of life (QoL) is an important patient-reported outcome that has been studied extensively as an endpoint. There is a growing interest in factors that may influence QoL, such as personality. This descriptive systematic review examined the relationship between personality and QoL in women with non-metastatic breast cancer. Methods: On November 24th, 2020, with a update on March 7th, 2022, PubMed, PsycINFO, CINAHL, Web of Science and Embase were systematically searched for studies that assessed the direct relationship between personality traits and QoL among adult women diagnosed with non-metastatic breast cancer. The National Institutes of Health Study Quality Assessment Tool was used to assess the quality and risk of bias of the included studies. Three reviewers independently extracted data regarding objectives, population, setting, design, method, outcome measurements and key results. The results are descriptively reported. Results: Twelve studies (6 cohort studies and 6 cross-sectional studies) were included. Three studies were rated as poor, one study was rated as good, and the remaining studies were rated as moderate. There was a small to moderate effect of personality on QoL as correlation coefficients ranged from 0.10 to 0.77, and the explained variance ranged from 4 to 43%. The (strength of the) relationship depended on the personality trait and QoL domain that was measured and was most apparent for the personality traits ‘optimism’ and ‘trait anxiety’ on psychosocial QoL domains. The results for the personality traits (unmitigated) agency, agreeableness, conscientiousness, novelty seeking, and self-efficacy indicated a smaller but statistically significant correlation between these personality traits and QoL. Conclusions: The results confirm that personality affects QoL in women with non-metastatic breast cancer and thus provides evidence that personality traits are indeed important influential factors of QoL. It is therefore strongly recommended for all future QoL research to measure personality traits and use these variables as predictive factors, as they are needed to accurately interpret QoL. Information regarding personality traits provide physicians and patients with an interpretation of low or deterioration of QoL, which could guide physicians to improve their patients’ health outcomes and subsequently QoL using psycho-oncological support or treatment.