Type D personality was indirectly associated with poorer asthma control through depression (β = -0.088), anxiety (β = -0.115), and impaired sleep quality (β = -0.057).
Cross-Sectional (n=150)
No
Does Type D personality affect asthma control through depression, anxiety, and sleep quality in adult asthma patients?
Type D personality is indirectly associated with poorer asthma control through increased psychological symptom burden and impaired sleep quality.
Effect estimate: β = -0.088 (95% CI -0.132, -0.047)
Abstract Type D personality, defined by the co-occurrence of negative affectivity and social inhibition, has been associated with poorer health outcomes in chronic diseases, including asthma. However, the psychological mechanisms underlying the relationship between Type D personality and asthma control remain unclear. This cross-sectional study included 150 adult patients with asthma recruited from a tertiary outpatient clinic. Participants completed the Asthma Control Test (ACT), Type D Personality Scale (DS-14), Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), and Pittsburgh Sleep Quality Index (PSQI). Type D personality traits were identified in 39.3% of the sample. Compared with non–Type D individuals, patients with Type D personality had higher depressive and anxiety symptom scores and poorer sleep quality (all p < 0.05). Mediation analyses using bootstrapping (5,000 resamples) revealed significant indirect effects of Type D personality on asthma control through depression (β = -0.088, 95% CI -0.132, -0.047), anxiety (β = -0.115, 95% CI -0.158, -0.078), and sleep quality (β = -0.057, 95% CI -0.091, -0.029). These indirect effects remained statistically significant after adjustment for age, sex, smoking status, and FEV1 (% predicted). These findings suggest that Type D personality is indirectly associated with poorer asthma control through increased psychological symptom burden and impaired sleep quality.
Şimşek et al. (2026) conducted a cross-sectional in Asthma (n=150). Type D personality vs. Non-Type D personality was evaluated on Indirect effect of Type D personality on asthma control through depression (β = -0.088, 95% CI -0.132, -0.047). Type D personality was indirectly associated with poorer asthma control through depression (β = -0.088), anxiety (β = -0.115), and impaired sleep quality (β = -0.057).