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. 2022 Jun 4;12:9316. doi: 10.1038/s41598-022-13417-5

Table 3.

Association of clinical factors with the presence or absence of ctDNA detection in follow plasma.

Detected ctDNA in follow Plasma
n = 5
Non detected ctDNA in follow plasma
n = 15
p value*
Age, over 65 2/5 6/15 1.0
Stage III–IV 5/5 6/15 0.037
HPV status Positive 0/5 11/15 0.008

*Fisher’s test.

Patient characteristics.