Scientific Reports (Oct 2021)

Outcomes in high and low volume hospitals in patients with acute hematochezia in a cohort study

  • Naoki Ishii,
  • Naoyoshi Nagata,
  • Katsumasa Kobayashi,
  • Atsushi Yamauchi,
  • Atsuo Yamada,
  • Jun Omori,
  • Takashi Ikeya,
  • Taiki Aoyama,
  • Naoyuki Tominaga,
  • Yoshinori Sato,
  • Takaaki Kishino,
  • Tsunaki Sawada,
  • Masaki Murata,
  • Akinari Takao,
  • Kazuhiro Mizukami,
  • Ken Kinjo,
  • Shunji Fujimori,
  • Takahiro Uotani,
  • Minoru Fujita,
  • Hiroki Sato,
  • Sho Suzuki,
  • Toshiaki Narasaka,
  • Junnosuke Hayasaka,
  • Tomohiro Funabiki,
  • Yuzuru Kinjo,
  • Akira Mizuki,
  • Shu Kiyotoki,
  • Tatsuya Mikami,
  • Ryosuke Gushima,
  • Hiroyuki Fujii,
  • Yuta Fuyuno,
  • Naohiko Gunji,
  • Yosuke Toya,
  • Kazuyuki Narimatsu,
  • Noriaki Manabe,
  • Koji Nagaike,
  • Tetsu Kinjo,
  • Yorinobu Sumida,
  • Sadahiro Funakoshi,
  • Kana Kawagishi,
  • Tamotsu Matsuhashi,
  • Yuga Komaki,
  • Kuniko Miki,
  • Kazuhiro Watanabe,
  • Fumio Omata,
  • Yasutoshi Shiratori,
  • Noriatsu Imamura,
  • Takahiko Yano,
  • Mitsuru Kaise

DOI
https://doi.org/10.1038/s41598-021-99832-6
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 10

Abstract

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Abstract Outcomes of acute lower gastrointestinal bleeding have not been compared according to hospital capacity. We aimed to perform a propensity score-matched cohort study with path and mediation analyses for acute hematochezia patients. Hospitals were divided into high- versus low-volume hospitals for emergency medical services. Rebleeding and death within 30 days were compared. Computed tomography, early colonoscopy (colonoscopy performed within 24 h), and endoscopic therapies were included as mediators. A total of 2644 matched pairs were yielded. The rebleeding rate within 30 days was not significant between high- and low-volume hospitals (16% vs. 17%, P = 0.44). The mortality rate within 30 days was significantly higher in the high-volume cohort than in the low-volume cohort (1.7% vs. 0.8%, P = 0.003). Treatment at high-volume hospitals was not a significant factor for rebleeding (odds ratio [OR] = 0.91; 95% confidence interval [CI], 0.79–1.06; P = 0.23), but was significant for death within 30 days (OR = 2.03; 95% CI, 1.17–3.52; P = 0.012) on multivariate logistic regression after adjusting for patients’ characteristics. Mediation effects were not observed, except for rebleeding within 30 days in high-volume hospitals through early colonoscopy. However, the direct effect of high-volume hospitals on rebleeding was not significant. High-volume hospitals did not improve the outcomes of acute hematochezia patients.