Lowest mean arterial pressure (MAP) thresholds for myocardial injury after noncardiac surgery (MINS). Univariable and multivariable relationship between MINS and absolute and relative lowest MAP thresholds. (A) and (C) Estimated probability of MINS were from the univariable moving-window with the width of 10% data; (B) and (D) were from multivariable logistic regression smoothed by restricted cubic spline with three degrees and knots at 10th, 50th, and 90th percentiles of given exposure variable. Multivariable models adjusted for covariates in table 1. (A) and (B) show that there was a change point (i.e., decreases steeply up and then flattens) around 65 mmHg, but 20% was not a change point from (C) and (D).