Table 2.

Comparison of ROC and MPM thresholds using logistic regression analysis

Models and predictors	OR (95 % CI)	p	AUC	AIC
ROC threshold
BNP ≥ 116 pg/ml or NTproBNP ≥ 277.5 pg/ml;	8.4 (4.98,14.11)	<0.001	0.768	431.63
Ref = BNP < 116 or NTproBNP < 277.5 pg/ml
Surgery type
Aortoiliac; Ref = Infrainguinal surgery	2.4 (1.33, 4.37)	0.004
Diabetes
Yes; Ref = No	2.0 (1.10, 3.54)	0.023
MPM threshold
BNP ≥ 115.57 pg/ml or NTproBNP ≥ 246.7 pg/ml;	8.5 (5.03, 14.41)	<0.001	0.777	430.16
Ref = BNP < 115.57 pg/ml or NTproBNP < 246.7 pg/ml
Surgery type
Aortoiliac; Ref = Infrainguinal surgery	2.5 (1.40, 4.60)	0.002
Diabetes
Yes; Ref = No	2.1 (1.15, 3.71)	0.015

ROC threshold is an indicator variable of BNP and NTproBNP thresholds determined by the ROC curve method (Allison 2012); MPM threshold is an indicator variable of BNP and NTproBNP thresholds determined by the minimum p value method

Ref reference level, OR odds ratio, CI confidence interval, AUC area under the ROC curve