Marital status and non-small cell lung cancer survival: The Lung Cancer Database Project in Japan

Objective: Previous studies have suggested that marital status is associated with survival from lung cancer; however, its association is not conclusive. The association between marital status and survival in Japanese patients with non-small cell lung cancer (NSCLC) was prospectively investigated. Methods: Between July 1999 and July 2004, a total of 1230 NSCLC patients were enrolled. The baseline survey consisted of the collection of clinical information and various demographic data, including marital status. A Cox regression model was used to estimate the hazards ratio (HR) of all-cause mortality adjustments for age, BMI, education level, performance status, histology type, clinical stage, smoking status, choice of definitive treatment, and depression. Results: The multivariable adjusted HR of male widowed patients versus male married patients was 1.7 (95% confidence interval = 1.2-2.5, p = 0.005). However, no significant increased risk of death in female widowed patients compared with female married patients was observed (HR = 0.7, 95% confidence interval = 0.5-1.1, p = 0.15). With regard to separated/divorced and single patients no significant increased risk of death in male and/or female compared with married patients was observed. Conclusions: The present data suggest that male widowed patients with NSCLC have a higher mortality rate than male married patients with NSCLC, after controlling for various factors.