An examination of the relationship of patient modifiable and non-modifiable characteristics with fear of cancer recurrence among colorectal cancer survivors.

PURPOSE: Fear of cancer recurrence (FCR) is one of the most common and distressing issues affecting cancer survivors. This study examined (1) the association between modifiable cognitive, behavioral, and social characteristics and FCR, (2) the association between non-modifiable characteristics and FCR, and (3) the relative contributions of modifiable and non-modifiable characteristics to FCR. METHODS: Participants (n = 120) had been diagnosed with colorectal cancer and completed cancer treatment in the past 6 to 36 months. Participants completed self-report measures of modifiable cognitive (e.g., beliefs about worry), behavioral (e.g., health-related reassurance seeking), and social (e.g., social constraints) characteristics. Non-modifiable characteristics (e.g., age, disease severity) were assessed via self-report and medical record review. FINDINGS: Modifiable (i.e., perceived risk, self-efficacy, positive beliefs about worry, negative beliefs about worry, intolerance of uncertainty, rumination, reassurance seeking, health-related reassurance seeking, social constraints) and non-modifiable (i.e., age, gender, disease severity, neuroticism, conscientiousness) characteristics were associated with FCR (p's < .05). Hierarchical linear regression analyses demonstrated that modifiable characteristics accounted for an additional 15% of the variance (p < .001) beyond that accounted for by non-modifiable characteristics (R2 = .45, p < .001), with perceived risk (B = .35) and health-related reassurance seeking (B = .22) emerging as significant predictors of FCR (p's < .05). IMPLICATIONS: Results identify non-modifiable characteristics that may serve as risk factors for greater FCR and identify specific modifiable characteristics (i.e., perceived risk, health-related reassurance seeking) to be targeted by interventions to reduce FCR among cancer survivors.

Loneliness as a mediator of the relationship of social cognitive variables with depressive symptoms and quality of life in lung cancer patients beginning treatment.

OBJECTIVE: Loneliness, or the discrepancy between perceived and desired level of social connectedness, is an understudied but important psychosocial factor in cancer patients. The current study investigated the relationship between loneliness, depressive symptoms, quality of life, and social cognitive variables (eg, stigma, social constraint, and cancer-related negative social expectations), and explored loneliness as a mediator of the relationship between social cognitive variables and depressive symptoms and quality of life in lung cancer patients beginning treatment. METHODS: Patients within 3 months of beginning treatment for lung cancer completed measures of loneliness, depressive symptoms, quality of life, and social cognitive variables. Correlational, chi-square, and hierarchical regression analyses evaluated relationships among variables. Bias-corrected bootstrapping methods estimated the indirect effect and 95% confidence interval for mediation models. RESULTS: Participants (n = 105, M = 65.5 years, 55% female) endorsed low to moderate levels of loneliness. Greater loneliness was associated with greater depressive symptoms and worse quality of life (P's < .001), and loneliness explained unique variance in depressive symptoms (F = 10.18, P < .001, ΔR2  = .06, Total R2  = .35) and quality of life (F = 19.55, P < .001, ΔR2  = .05, Total R2  = .52) after controlling for significant covariates. Greater stigma, social constraint, and cancer-related negative social expectations were associated with greater loneliness and depressive symptoms and worse quality of life (P's < .001). Loneliness partially mediated the relationship of social cognitive variables with depressive symptoms and quality of life. CONCLUSIONS: Beyond its direct impact on clinically relevant outcomes, the experience of loneliness may be a mechanism by which social cognitive factors influence depressive symptoms and quality of life in lung cancer patients.