Breast cancer is the most common form of cancer among Canadian women. Survivorship challenges include fatigue, sleep disturbance, and cognitive impairment. This study examined: 1) symptom trajectory from diagnosis to three years; 2) whether symptom change in the rst four months was associated with prolonged di culties after three years; and 3) which factors were associated with deterioration in symptoms during the rst four months.
MethodsThis prospective observational cohort study examined 53 women (M age = 58.6, 96.2% White, 67.9% Stage I) with newly diagnosed breast cancer over three years. Women completed assessments before starting treatment, four months, and three years after diagnosis. Three-way repeated-measures ANOVAs evaluated symptom trajectories. A repeated-measures mediation analysis was performed to determine if change from pre-treatment to four months accounted for change from pre-treatment to three years. A series of between-subjects ANOVAs were used to determine what variables signi cantly differed by deterioration status.
ResultsPerceived cognitive impairment and fatigue increased linearly from diagnosis to three years. Change in fatigue in the rst four months fully accounted for its change over three years. Insomnia severity and sleep quality deteriorated from diagnosis to four months, but returned to pre-treatment levels at three years. Those whose fatigue and cognitive ability deteriorated during the rst four months were younger.
ConclusionEfforts to identify those who are at risk of experiencing fatigue, sleep disturbance, and cognitive impairment; monitor patients early after receiving a diagnosis; and provide targeted interventions may prevent long-term deterioration and improve well-being.