Figure 4
SROC curve of VOCs for the diagnosis of digestive system cancer. Abbreviations: The numbers in the circles represent the studies included in the paper. The eighth study corresponds to reference12, and the remaining studies1,2,3,4,5,6,7,8,9,10,11,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36 correspond to reference27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61. VOCs: Volatile organic compounds.
