The association between triglyceride glucose-body mass index and all-cause mortality in critically ill patients with atrial fibrillation: a retrospective study from MIMIC-IV database

Table 3 Threshold effect analysis of TyG-BMI index on 30-day and 365-day all-cause mortality in AF patients

	HR (95% CI), P-value
30-day mortality
Fitting by the standard linear model	0.998 (0.997−1.000) 0.02
Fitting by the two-piecewise linear model
Inflection point	223.60
TyG-BMI < 223.60	0.982 (0.976–0.988) < 0.01
TyG-BMI ≥ 223.60	1.000 (0.999–1.002) 0.72
P for Log-likelihood ratio	< 0.01
365-day mortality
Fitting by the standard linear model	0.998 (0.997–0.999) < 0.01
Fitting by the two-piecewise linear model
Inflection point	255.02
TyG-BMI < 255.02	0.989 (0.986–0.991) < 0.01
TyG-BMI ≥ 255.02	1.000 (0.999–1.002) 0.59
P for Log-likelihood ratio	< 0.01

TyG-BMI, triglyceride glucose-body mass index; The inflection of threshold effect analysis of TyG-BMI index on 30-day all-cause mortality was 223.60; The inflection of threshold effect analysis of TyG-BMI index on 365-day all-cause mortality was 255.02

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