“…Although sleep disorders can occur singly or in combination and can include different types of sleep disturbances, insomnia symptoms are the most frequent sleep disorder in the oncological population, affecting 30%–50% of patients with OC (Ancoli‐Israel, 2015; Berger, Matthews, & Kenkel, 2017; Howell et al, 2014; Matthews, Carter, Page, Dean, & Berger, 2018; Otte et al, 2015). In patients with OC, insomnia symptoms tend to persist for years after OC, being related to symptoms persistency (Beesley et al, 2013, 2020), higher risk of invasive serous OC (Liang et al, 2020), poorer recovery from depression and anxiety (Irwin, 2013), and greater severity of other cancer‐related symptoms, in particular daytime fatigue in survivors (Joly et al, 2019), affecting wellbeing and quality of life (Beesley et al, 2020; Ross et al, 2020). Insomnia in OC becomes a domain of measuring quality of life based on patient‐reported outcomes (Donovan et al, 2014).…”