Table 2

Demographic and clinical characteristics of the sample are shown in table 2

ObservationFree-text sample (n=3055)Marched-pair samples (2992)
CUP (n=1496)Non-CUP (n=1496)
Age
 Mean (SD)65.3 (11.3)66.5 (11.7)66.6 (11.5)
 Median (IQR)66 (58, 73)67 (59, 75)67 (59, 75)
 Range16, 9520, 9823, 94
 Sexn%n%n%
 Male112136.758339.058339.0
 Female193463.391361.091361.0
Diagnosis
 CUP30551001496100
 Breast1117.4
 Head and neck18512.4
 Lung27118.1
 Pancreatic442.9
 Prostate523.5
 Renal895.9
 Upper and lower GI74449.7
ICD-10 codes
 C7751416.839927
 C78117238.449633
 C79120939.643529
 C801605.216611
  • CUP, cancer of unknown primary; ICD-10, International Classification of Diseases 10th Revision.