Table 2.

Association between sarcopenia and mortality (3-year follow-up) according to Cox Regression Models adjusted for potential confounders.

	Unadjusted	Model 1	Model 2	Model 3
Sarcopenia index per 1-SD	0.77 (0.59–0.98)	0.78 (0.59–0.97)	0.81 (0.65–0.95)	0.80 (0.63–0.97)
Quartile of sarcopenia index
Q1	2.31 (1.25–5.11)	2.10 (1.18–4.71)	1.98 (1.12–4.35)	1.85 (1.10–4.21)
Q2	1.71 (1.01–3.89)	1.46 (1.05–3.16)	1.39 (1.08–3.01)	1.28 (1.03–3.11)
Q3	1.54 (0.67–3.58)	1.50 (0.74–3.10)	1.45 (0.88–2.89)	1.25 (0.78–2.56)
Q4	1 (reference)	1 (reference)	1 (reference)	1 (reference)

Data are presented as hazard ratios (95% confidential intervals). Sarcopenia index was treated as both a categorical variable (using quartile cutoff points) and a continuous variable (per 1-SD), separately.

Q stands for sarcopenia index: Q1 is the lowest quartile and Q4 is the highest quartile. Cutoffs for sarcopenia index are Q1 < 63.9, Q2 63.9-74.3, Q3 74.3-84.2, Q4 > 84.3.

Model 1: adjusted for age and gender. Model 2: adjusted for age, gender, depression and cognitive impairment. Model 3: adjusted for age, gender, depression, cognitive impairment, nutrition status, hemoglobin, body mass index, calf circumference, gait speed, and handgrip strength.