ONCOmmunity

Artificial intelligence versus expert endoscopists for diagnosis of gastric cancer in patients who underwent upper gastrointestinal endoscopy.

By: Ryota Niikura, Tomonori Aoki, Satoki Shichijo, Atsuo Yamada, Takuya Kawahara, Yusuke Kato, Yoshihiro Hirata, Yoku Hayakawa, Nobumi Suzuki, Masanori Ochi, Toshiaki Hirasawa, Tomohiro Tada, Takashi Kawai, Kazuhiko Koike

Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
2021-10-4; doi: 10.1055/a-1660-6500

Abstract

Introduction

To compare endoscopy gastric cancer images diagnosis rate between artificial intelligence (AI) and expert endoscopists.

Patients

We used the retrospective data of 500 patients, including 100 with gastric cancer, matched 1:1 to diagnosis by AI or expert endoscopists. We retrospectively evaluated the non-inferiority (prespecified margin 5%) of the per-patient rate of gastric cancer diagnosis by AI and compared the per-image rate of gastric cancer diagnosis.

Results

Gastric cancer was diagnosed in 49 of 49 patients (100%) in the AI group and 48 of 51 patients (94.12%) in the expert endoscopist group (difference 5.88, 95% confidence interval: -0.58 to 12.3). The per-image rate of gastric cancer diagnosis was higher in the AI group (99.87%, 747/748 images) than in the expert endoscopist group (88.17%, 693/786 images) (difference 11.7%).

Conclusions

Non inferiority of the rate of gastric cancer diagnosis by AI was demonstrated but superiority is not demonstrated.