Table 1.

Population characteristics (N = 88)

ParametersN (%)
Gender (N, %)
 Women58 (66%)
 Men30 (34%)
Ethnicity (N, %)
 Caucasian58 (65.9%)
 Asian18 (20.5%)
 Othera12 (13.6%)
Age at diagnosis (median, range)66.2 years (36.3–89.5)
Median number of therapies in metastatic setting at time of ctDNA test1 (range, 0–13)
Median time from diagnosis to ctDNA results (median, 95% CI)11.7 months (6.2–15.8)
Time from blood draw to ctDNA results (median, 95% CI)15 days (14–15)
Smoking status
 Never smokerb36 (40.9%)
 Smokers50 (56.8%)
 Unknown2 (2.3%)
Number of patients with ≥1 alteration72 (82%)
  • aIncluded Hispanic, N = 2; African American, N = 1, Middle Eastern, N = 1, and unknown, N = 8.

  • bPatients whose medical chart indicated that they smoked <100 cigarettes in their lifetime were considered never-smokers for the purpose of this study.