Cardiopulmonary prognosis of prophylactic endotracheal intubation in patients with upper gastrointestinal bleeding undergoing endoscopy

Yufang Lin, Fei’er Song, Weiyue Zeng, Yichi Han, Xiujuan Chen, Xuanhui Chen, Yu Ouyang, Xueke Zhou, Guoxiang Zou, Ruirui Wang, Huixian Li, Xin Li

Figure 2. Relationship between clinical risk factors and cardiopulmonary outcomes determined by restricted cubic spline plots. OR: odds ratio; 95% CI: 95% confidence interval; APACHE IV: Acute Physiology and Chronic Health Evaluation IV. The purple density curve represents the distribution of each continuous factor. The solid red line represents the univariate odds ratio, while the dashed line represents the 95% confidence interval derived from restricted cubic spline regression. The black dashed line represents a reference line with a ratio of 1.0.