Table 5. Overall survival: Explanatory prognostic factors in a Cox proportional Hazards model for the selected study collective.

Included variables: sex (male (ref.) vs. female), age (< 80 years (ref.) vs. ≥ 80 years), LVEF (as a continuous variable), LVEF (LVEF < 45% (ref.) vs. ≥ 45%); previous malignancy (no previous (ref.) malignancy vs. previous malignancy); SPN (no SPN (ref.) vs. SPN ≥ 5 mm and all others (ref.) vs. SPN > 8 mm), lymphadenopathy (no lymphadenopathy (ref.) vs. lymphadenopathy) and pleural effusions (no pleural effusions (ref.) vs. pleural effusions).

Identified prognostic factor	p-Value*	HR1 (95% CI)2
LVEF	0.009	2.194 (1.220–3.947)

¹ HR = hazard ratio: HR <1 indicates improved survival.

² CI = confidence interval.

* p value indicates model improvement (likelihood ratio test).