title: Critical evaluation of the cytodiagnosis of fibrogastroendoscopic samples obtained under direct vision.
abstract: The reliability and efficiency of the cytodiagnosis of fibrogastroendoscopic biopsy samples obtained under direct vision in 676 cases during a five-year period were reviewed. The critical evaluation showed a cytodiagnostic sensitivity of 93.54%, a specificity of 98.79%, a false-negative rate of 6.46%, a false-positive rate of 1.21%, a predictive value of a positive result of 98.01%, a predictive value of a negative result of 96.00%, a prevalence rate of 38.91%, an overall diagnostic accuracy of 96.75% and a chi-square value of 5.50 (P less than .05). These results were comparable to those obtained by histologic study in the same cases; the combined use of both cytology and histology to analyze the samples obtained gave the best results. These findings reemphasize the important role of fibrogastroendoscopic cytodiagnosis in establishing the existence of gastric cancer and shows that the technique is accurate and efficient. The types of statistics useful for assessing such data are discussed.
authors.affiliation: Department of Oncology, First Affiliated Hospital, Inner Mongolia Medical College, Huhehot, Inner Mongolian Autonomous Region, Peoples Republic of China.
authors.forename: C S
authors.initials: CS
authors.lastname: Lan
mesh_terms: D003581:Cytodiagnosis; D005188:False Negative Reactions; D005189:False Positive Reactions; D005336:Fiber Optic Technology; D005773:Gastroscopy; D006801:Humans; D011237:Predictive Value of Tests; D013274:Stomach Neoplasms / Q000175:diagnosis*