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Table 3 Intensity changes in IMS signals between pre- and postoperative measurements: Area no. 1–25 (see Fig. 2), preoperative and postoperative signal count (n of 22 patients with IMS signal in measurement), Δ of IMS signal intensity (0: no or little changes, +: increased signal, −: decreased signal)

From: Prediction of oral squamous cell carcinoma based on machine learning of breath samples: a prospective controlled study

Area no Preoperative signal count Postoperative signal count Δ of IMS signal
1 21/22 20/22 0
2 21/22 19/22 0
3 20/22 17/22 +
4 21/22 17/22
5 20/22 18/22 +
6 13/22 19/22 +
7 20/22 14/22 0
8 16/22 13/22 0
9 22/22 22/22 0
10 16/22 13/22 0
11 20/22 15/22
12 12/22 15/22 +
13 15/22 12/22
14 13/22 13/22 0
15 21/22 16/22
16 20/22 11/22
17 7/22 11/22 0
18 11/22 14/22 +
19 10/22 12/22 +
20 4/22 13/22 +
21 17/22 17/22 0
22 9/22 9/22 0
23 19/22 18/22 0
24 0/22 2/22 0
25 1/22 0/22 0