Table 3 Threshold effect analysis of the MAP and 28-day mortality.

From: U shaped relationship between mean arterial pressure and 28 day mortality in ICU patients with acute myocardial infarction

Models

Per-unit increase

Per-SD increase

OR (95% CI)

P value

OR (95% CI)

P value

Model I

 One line effect

1.00 (1.00, 1.00)

0.3265

0.95 (0.85, 1.06)

0.3265

Model II

 Turning point (K)

84

 − 0.03

  

 MAP < K

0.95 (0.93, 0.96)

 < 0.0001

0.11 (0.07, 0.19)

 < 0.0001

 MAP ≥ K

1.03 (1.02, 1.03)

 < 0.0001

2.67 (2.08, 3.44)

 < 0.0001

 P value for LRT test*

 

 < 0.001

 

 < 0.001

Broken point prescription predicted value

 − 5.17 (− 5.56, − 4.79)

 

 − 5.17 (− 5.55, − 4.79)

 
  1. Data were presented as OR (95% CI) P value; Model I, linear analysis; Model II, non-linear analysis. Adjusted for: Gender; Age (years); Ethnicity; unittypeICU; BMI; DIALYSIS; Respiratory rate (bpm); Heart rate (/min); COPD; Glucose (mg/dl); DM; Pneumonia; Calcium (mg/dl); PLT (cells × 109/L); WBC (cells × 109/L). CI, confidence interval; OR, odds ratio; LRT, logarithm likelihood ratio test. * P < 0.05 indicates that model II is significantly different from Model I. 1SD = 39.4 mmHg.
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