approaching significanceP =0.061
cfDNA+ patients more frequently had a higher ECOG performance status (LL3: P =0.0029; LL6: P =0.0022), greater tumour burden (measured as the sum of the longest diameter of target lesions; approaching significance in LL3: P =0.061; LL6: P =0.0001), more metastatic sites (LL3: P =0.0003; LL6: P <0.0001), and metastases to the bone (LL3 and LL6: P <0.0001) and liver (LL3: P <0.0001; LL6: P =0.0003; Table 2 ).