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. 2021 Oct;11(10):e2340.
doi: 10.1002/brb3.2340. Epub 2021 Sep 2.

Psychosocial factors and cancer incidence (PSY-CA): Protocol for individual participant data meta-analyses

Affiliations

Psychosocial factors and cancer incidence (PSY-CA): Protocol for individual participant data meta-analyses

Lonneke A van Tuijl et al. Brain Behav. 2021 Oct.

Abstract

Objectives: Psychosocial factors have been hypothesized to increase the risk of cancer. This study aims (1) to test whether psychosocial factors (depression, anxiety, recent loss events, subjective social support, relationship status, general distress, and neuroticism) are associated with the incidence of any cancer (any, breast, lung, prostate, colorectal, smoking-related, and alcohol-related); (2) to test the interaction between psychosocial factors and factors related to cancer risk (smoking, alcohol use, weight, physical activity, sedentary behavior, sleep, age, sex, education, hormone replacement therapy, and menopausal status) with regard to the incidence of cancer; and (3) to test the mediating role of health behaviors (smoking, alcohol use, weight, physical activity, sedentary behavior, and sleep) in the relationship between psychosocial factors and the incidence of cancer.

Methods: The psychosocial factors and cancer incidence (PSY-CA) consortium was established involving experts in the field of (psycho-)oncology, methodology, and epidemiology. Using data collected in 18 cohorts (N = 617,355), a preplanned two-stage individual participant data (IPD) meta-analysis is proposed. Standardized analyses will be conducted on harmonized datasets for each cohort (stage 1), and meta-analyses will be performed on the risk estimates (stage 2).

Conclusion: PSY-CA aims to elucidate the relationship between psychosocial factors and cancer risk by addressing several shortcomings of prior meta-analyses.

Keywords: cancer risk; depression; health behaviors; meta-analysis; psycho-oncology.

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Conflict of interest statement

The authors declare no conflict of interests.

Figures

FIGURE 1
FIGURE 1
The three models that are researched in psychosocial factors and cancer incidence (PSY‐CA): (1) the longitudinal association between psychosocial factors and cancer incidence, (2) the interaction between psychosocial factors and health behaviors, somatic factors, and demographic factors in cancer incidence, and (3) the mediating role of health behaviors in the longitudinal association between psychosocial factors and cancer incidence

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