Table 3.

Subgroup analysis of frailty with TyG index.

Subgroup	TyG index				P for interaction
	Q1	Q2	Q3	Q4
Age					0.436
<65 years	Ref	0.84(0.6 ~ 1.17)	1.12(0.81 ~ 1.54)	1.21(0.87 ~ 1.67)
≥65 years	Ref	1.18(0.78 ~ 1.79)	1.39(0.92 ~ 2.12)	1.9(1.23 ~ 2.93)
Gender					0.350
Female	Ref	1.2(0.82 ~ 1.76)	1.16(0.78 ~ 1.72)	1.45(0.97 ~ 2.18)
Male	Ref	0.85(0.59 ~ 1.21)	1.27(0.91 ~ 1.79)	1.44(1.03 ~ 2.03)
BMI
≤24 kg/m2	Ref	1.1(0.78 ~ 1.54)	1.26(0.87 ~ 1.82)	1.78(1.21 ~ 2.6)	0.576
>24 kg/m2	Ref	0.83(0.55 ~ 1.25)	1.13(0.78 ~ 1.64)	1.17(0.81 ~ 1.69)

The TyG index, was categorized into four quartiles: Q1 (<8.29 mg/dL), Q2 (8.29–8.68 mg/dL), Q3 (8.68–9.14 mg/dL), and Q4 (≥9.14 mg/dL). Ref: reference. BMI, body mass index (≤24 kg/m², >24 kg/m²).