Correlation of baseline and post-chemotherapy follow-up parameters with cfDNA detectability

Baseline and post-chemotherapy correlationsParametersSpearman coefficientP value
Correlation of cfDNA detectability at baselineGender–0.120.35
ECOG status0.190.16
KPS0.210.11
Smoking status0.040.77
Smoking severity–0.090.49
TNM 8 stage0.180.16
Co-morbidities0.040.76
RSB score0.050.71
TSB score0.050.71
Weight change–0.080.52
Correlation of cfDNA detectability at follow-up (post chemotherapy)ECOG status0.001.00
KPS0.100.60
RSB score–0.320.11
TSB score–0.100.60
Weight change0.100.63
RECIST 1.1 change–0.020.93

cfDNA: cell free DNA; ECOG: Eastern Co-operative Oncology Group; KPS: Karnofsky performance scale; TNM: tumor-nodes-metastasis; RSB: respiratory symptom burden; TSB: total symptom burden