TABLE 9.

Characteristics reported of the drop‐outs in the various studies

Demographics	No difference in age (Henry et al., 2018) Being younger (Bray et al., 2017) Men (Bruggeman‐Everts et al., 2015; Willems, Bolman, et al., 2017) Lower educational level (Bruggeman‐Everts et al., 2015; Kubo et al., 2018) Lower income (Kubo et al., 2018) Higher social functioning (Willems, Bolman, et al., 2017) Less occupied with household activities (Bruggeman‐Everts et al., 2015) Shorter time since diagnosis (Kubo et al., 2018)
Health	Higher rates of antidepressant use (Bray et al., 2017) Suffering from fatigue shorter (Bruggeman‐Everts et al., 2015) Poorer quality of life (Bruggeman‐Everts et al., 2015) Less good prognosis (Bruggeman‐Everts et al., 2015) More comorbidities (Bruggeman‐Everts et al., 2015) Less often breast cancer (Bruggeman‐Everts et al., 2015) More often ‘other’ cancer (Bruggeman‐Everts et al., 2015) Less often already received help to manage fatigue (Spahrkäs et al., 2020b)
Other	No difference between any of the background/outcome variables (Bruggeman‐Everts et al., 2017; Zachariae et al., 2018) Being in intervention group (Willems, Bolman, et al., 2017; Zernicke et al., 2014)