成对样品;
Paired colorectal tissue samples and corresponding nonmalignant tissues were obtained by surgical resection.
手术切除标本后,分别配对取其大肠癌变部位组织以及正常组织。
By paired-samples χ~ 2 test, we found that the diagnosis rate of dysphagia patients were significant difference between videofluoroscopy examination, bedside water-swallowing test and gag reflex test ( P < 0.01).
经配对计数资料χ2检验,电视透视检查对吞咽困难的检出率明显高于洼田饮水试验和咽反射(P<0·01)。
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