Parents caring for children with rare diseases fear the long-term progression of the child’s disease. The current study aims to systematically investigate the quality of life (QoL) in parents of children with different rare diseases. We performed a systematic literature search including quantitative studies on QoL of parents caring for children and adolescents with rare diseases in five databases (APA PsycArticles, APA PsycInfo, MEDLINE, PSYNDEXplus, and PubMed) published between 2000–2020. Of the 3985 titles identified, 31 studies met the inclusion criteria and were selected for narrative review. Studies were included if they investigated predictors of parental QoL or reported QoL compared to normative samples, parents of healthy children, or children with other chronic diseases. We used the Newcastle–Ottawa Scale to assess methodological quality. The systematic review revealed that parents of children with rare diseases experience reduced QoL compared to parents with healthy children and norm values. Psychosocial factors, beyond disease-specific predictors, were shown to influence parental QoL substantially and may thus present an essential aspect within interventions for this highly burdened group. Health care professionals should consider and address the impairment of parental QoL due to the child’s rare disease. We discuss insights into existing research gaps and improvements for subsequent work.

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(1) Parents caring for children and adolescents with rare diseases fear the long-term progression of the child’s disease and the loss of their parental role. The aim of this study was to examine the quality of life, mental health and associated protective factors of mothers and fathers caring for children with rare diseases requiring mechanical long-term ventilation. (2) In a cross-sectional design, data on quality of life, mental health, coping mechanisms, social support and family functioning from n = 75 affected families were collected using standardized psychometric questionnaires. (3) Mothers compared to fathers were significantly more impaired in their quality of life and mental health. Protective factors significantly associated with the respective outcomes for mothers were coping mechanisms, social support and family functioning, whereas for fathers solely the latter was found to be significant. Multiple regression analyses showed that family functioning may be the most important predictor of quality of life and mental health. (4) The results support the need for family-oriented care in parents of children with rare diseases. To reach optimal efficiency, health care providers should not only screen parents for psychosocial impairment but also provide interventions that consider gender-specific differences in psychological health.