Research Article: Influencing factors of low-dose computed tomography screening behavior among first-degree relatives of lung cancer patients based on the theory of planned behavior: a qualitative study
Abstract:
To explore the factors influencing the screening behavior of first-degree relatives of lung cancer patients toward low-dose computed tomography (LDCT) screening based on the Theory of Planned Behavior (TPB), gain deeper insights into their subjective experiences and core demands, and provide a theoretical basis and improvement measures for enhancing screening participation rates among this high-risk population.
Employing a descriptive phenomenological approach, semi-structured interviews were conducted with 14 first-degree relatives of lung cancer patients at a hospital from May to July 2025. Thematic analysis was performed using directed content analysis.
Guided by the TPB, 11 themes across 3 dimensions were identified: Behavioral Attitudes (affirming screening value, family environment influence, cognitive biases hindering screening), Subjective Norms (influence of others’ behavior, healthcare professional recommendations, rural cognitive limitations), and Perceived Behavioral Control (financial constraints, work-time conflicts, cumbersome screening procedures, negative psychological perceptions, policy reference effects).
Screening behaviors among first-degree relatives of lung cancer patients are influenced by multidimensional factors. Healthcare providers should integrate the TPB framework and implement multi-level improvement measures—including enhanced health education, optimized screening services, and improved policy support—to increase screening adherence.
Introduction:
According to the Global Cancer Statistics Report, approximately 2.5 million new lung cancer cases were diagnosed worldwide in 2022, accounting for 12.4% of all new cancer cases and ranking as the most prevalent malignant tumor globally ( 1 ). In 2022, the number of new cases and deaths of lung cancer in China reached 1.06 million and 733,000, respectively. Its incidence and mortality rates continued to rank first among all types of malignant tumors, posing a serious threat to public health ( 2 ). Epidemiological…
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