Background: Research has been mainly focused on how to elicit patient preferences, with less attention on why patients form certain preferences. Objectives: To assess which psychological instruments are currently used and which psychological constructs are known to have an impact on patients' preferences and health-related decisions including the formation of preferences and preference heterogeneity. Methods: A systematic database search was undertaken to identify relevant studies. From the selected studies, the following information was extracted: study objectives, study population, design, psychological dimensions investigated, and instruments used to measure psychological variables. Results: Thirty-three studies were identified that described the association between a psychological construct, measured using a validated instrument, and patients' preferences or health-related decisions. We identified 33 psychological instruments and 18 constructs, and categorized the instruments into 5 groups, namely, motivational factors, cognitive factors, individual differences, emotion and mood, and health beliefs. Conclusions: This review provides an overview of the psychological factors and related instruments in the context of patients' preferences and decisions in healthcare settings. Our results indicate that measures of health literacy, numeracy, and locus of control have an impact on healthrelated preferences and decisions. Within the category of constructs that could explain preference and decision heterogeneity, health locus of control is a strong predictor of decisions in several healthcare contexts and is useful to consider when designing a patient preference study. Future research should continue to explore the association of psychological constructs with preference formation and heterogeneity to build on these initial recommendations.

Objective Little is known about the process of becoming a mother in women who experienced a breast cancer diagnosis (BC). In this qualitative study, we investigated maternal representations in pregnant women with experience of BC and those with no oncological history. Methods A total of 38 women were recruited, 19 women who experienced a BC diagnosis and 19 who had not. To explore maternal representations, semi‐structured interviews were conducted and analysed through thematic analysis. Results Four main themes were identified: fears and worries, meaning of motherhood, mother–foetus relationship and partner support. Across themes, differences between primiparous and multiparous are reported. Women with gestational breast cancer (GBC) described fear for their own and their child's survival. Women with previous BC recall contrasting emotions. All women with experience of BC perceived breastfeeding as fundamental and inability to do so provoked worry. Relationship with the partner was considered central, while healthy women were projected towards the future triadic relationship. Conclusions Finding a mental space during pregnancy for the representation of the future child could be hard for women with GBC. Dissimilarities in the experience of motherhood in cancer patients provide insight into psychological aspects that should be taken into account in clinical practice.

BackgroundCancer during pregnancy is a rare event. However, knowledge about treatment has progressed in recent years with improved maternal and neonatal outcomes. The number of women who decide to continue their pregnancy and undergo cancer treatment is increasing.Main bodyWomen face two critical events simultaneously; oncological illness and pregnancy, with different and conflicting emotions. In addition, the last trimester of gestation sets the ground for construction of the mother-child relationship, which is of great importance for the child’s development. Studies have showed that maternal exposure to stressful events during pregnancy is linked to adverse outcomes in children. Although several authors consider cancer to be a ‘critical life event’, studies that address the psychosocial implications of cancer in expecting mothers are scarce. There are no studies addressing the possible negative impact of a cancer diagnosis during pregnancy on the mother-child relationship and on the child’s development. It is important to emphasize the need for in-depth knowledge of the contributing psychological factors involved in order to provide holistic, individualised, and supportive care.ConclusionAn analysis of cognitive aspects, emotional processes, and maternal attachment in cases of cancer during pregnancy may contribute to the development of a model of care, both in an evolutionary and in a psycho-oncology context, with implications for clinical practice.