Influence of Family History on Perceived Susceptibility to Colorectal Cancer: a Surveyof Community-Based Colorectal Cancer Screening Participants

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  • Zheng YingFang
    School of Health Sciences & Nursing, The Graduate School of Medicine, The University of Tok y o
  • Saito Tami
    School of Health Sciences & Nursing, The Graduate School of Medicine, The University of Tok y o
  • Takahashi Miyako
    School of Health Sciences & Nursing, The Graduate School of Medicine, The University of Tok y o
  • Ishibashi Teruo
    Ishibashi Occupational Safety and Health Consultant Office
  • Kai Ichiro
    School of Health Sciences & Nursing, The Graduate School of Medicine, The University of Tok y o

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  • 大腸癌に罹患するリスクの認識に及ぼす大腸癌家族歴の影響 − S 市におけるアンケート調査から−

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Abstract

Objective: The present study was undertaken to examine the relationship between a family history of colorectal cancer （CRC） and perceived susceptibility to CRC. Methods: The study involved 426 subjects who participated in a community-based CRC screening program in Nagano prefecture in 2003. The questionnaire included perceived susceptibility to CRC, the family history of CRC, self-rated health, health consciousness, past history of CRC screening, health behaviors, knowledge about CRC risk factors, a-trait anxiety scale and socio-demographic characteristics. Results: Among the 387 individuals analyzed, 56 participants（14.5 ％）reported a positive family history of CRC in at least one first-degree relative（FDR+）. FDR+ individuals reported greater perceived susceptibility （8.2 ± 2.6）of developing CRC than those without family history（6.3 ± 2.7）（p ＜ 0.001）. However, 18.5 ％ of FDR+ individuals did not view themselves at an elevated risk. In multiple regression models, family history of CRC was still a significant correlate of the perceived susceptibility to CRC（β＝ 0.222, p ＜ 0.001）. Conclusions: These results provide evidence that family history of CRC is an independent predictor of perceived susceptibility. Educational interventions should promote understanding of CRC risk factors, so that individuals with a family history of CRC will be better able to adhere to CRC screening recommendations.

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