Fig. 3. Simple linear regression between fractional minimum mean arterial pressure (MAP) and 1-day ([ A ] and [ C ]) and 1-month ([ B ] and [ D ]) composite Z score for normotensive ([ A ] and [ B ]) and hypertensive ([ C ] and [ D ]) patients. ( C ) There is a significant positive linear relationship between factional minimum intraoperative MAP and 1-day composite Z score for hypertensive patients. Although this trend continues at 1 month, there is no significant relationship in any of the other simple linear regressions. (Reg Coef (SE) = regression coefficient [SE of regression coefficient]).