3.1. Summary of Patient’s Baseline Characteristics and Treatment Response at the 1st Follow-Up CT
PD
A total of 138 eligible patients (53% female) were included, with a median age of 73 years ranging from 61 to 91 years. ECOG ranged from 0 to 4, with 81/138 (59%) having an ECOG ≤ 1 and 53/138 (38%) with ECOG ≥ 2, while 4/138 (3%) had an unknown ECOG status. Most patient (92%) were current or ex-smokers (At first FU CT, 46/138 (33%) showed PD and 92/138 (67%) patients had DC, including 1 (1%) CR, 51 PR (37%), and 40 SD (29%). The objective response rate (ORR) was 38% (ORR = CR + PR/138). The baseline variables are summarized and compared between the PD and DC groups in 