Table 8.

Multivariate proportional mortality hazard ratios (HRs) by relative truncal fat (RTF) and fitness category in study participants

Fitness categorya	No. of subjects	No. (%) of deaths	P trendsb	HR (95% CI)c	P value
RTF 1st quartile
Low fitness	384	60 (15.6)	0.033	2.32 (1.40–3.83)	0.001
Moderate fitness	343	38 (11.1)		1.91 (1.13–3.24)	0.017
High fitness	273	28 (10.3)		1.70 (0.97–2.98)	0.063
RTF 2nd quartile
Low fitness	348	48 (13.8)	0.004	1.93 (1.15–3.23)	0.012
Moderate fitness	334	36 (10.8)		1.73 (1.02–2.95)	0.043
High fitness	319	22 (6.9)		1 (Reference)	–
RTF 3rd quartile
Low fitness	326	54 (16.6)	0.003	1.73 (1.05–2.87)	0.033
Moderate fitness	316	39 (12.3)		1.58 (0.94–2.67)	0.087
High fitness	357	32 (9.0)		1.06 (0.61–1.83)	0.837
RTF 4th quartile
Low fitness	280	47 (16.8)	0.009	1.50 (0.90–2.52)	0.123
Moderate fitness	346	46 (13.3)		1.27 (0.76–2.12)	0.365
High fitness	374	37 (9.9)		0.93 (0.55–1.58)	0.789

RTF quartiles: 1st, < 0.50; 2nd, 0.50– < 0.54; 3rd, 0.54– < 0.58; 4th, ≥ 0.58

CI confidence interval, RTF relative truncal fat

^aFitness was assessed with a 6-m walk test. Fitness tertiles: 1st, walking speed < 0.88 m/s (low fitness); 2nd, walking speed 0.88– < 1.05 m/s (moderate fitness); 3 rd, walking speed ≥ 1.05 m/s (high fitness)

^b P values for trend were obtained by using chi-square test (linear-by-linear association)

^cAdjusted for age, sex, medical history (diabetes, stroke, hypertension, myocardial infarction, angina, and congestive heart failure), current smoking, and CVD medications (ACE inhibitor, aspirin, beta blocker, calcium channel blocker, and statin)