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. 2019 Mar 11;68(12):2161–2169. doi: 10.1136/gutjnl-2018-317366

Figure 5.

Figure 5

The accuracy, sensitivity and specificity of WISENSE for monitoring blind spots in real EGD videos. In 107 real EGD videos, WISENSE monitored blind spots with an average accuracy of 90.02%, and a separate accuracy for each site ranging from 70.21% to 100%. The average sensitivity and specificity were of 87.57% and 95.02%, ranging from 63.4% to 100% and 75% to 100%, respectively. All EGD videos contain the oesophagus and duodenum; therefore, the negative value of oesophagus and duodenum was zero and specificity of the two sites was unavailable. True positive, WISENSE lights up site A in the stomach model when endoscopists also label site A; true negative, WISENSE leaves site B in transparent in the stomach model and site B is also not labelled by endoscopists. The number of videos containing site C is the ‘positive’ value of site C, and the number of videos missing site D is the ‘negative’ value of site D. Acccuracy=true predictions/(positive+negative), sensitivity=true positive/positive, specificity=true negative/negative. EGD, esophagogastroduodenoscopy.