Differences between included and excluded patients.
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*Nonparticipants include low DNA level (n = 51, 18%) and unable to collect the endoscopic biopsy (n = 26, 9%). Excluded participants include tumour misclassification (n = 3, 1%), tumour detected at autopsy (n = 11, 3%) and unavailable endoscopic material (n = 53, 15%).#Tumour location was similar in the participants and non-participant/excluded groups (p = 0.113, Fisheŕs exact test) except for more missing in the non-participant/excluded group p
创建时间：
2015-12-02
