TABLE 4.

Hazard ratios of different BMR categories for all-cause mortality grouped by age and sex.

Variables	Event, n (%)	Crude model		Model I		Model II
		HR (95%CI)	P-value	HR (95%CI)	P-value	HR (95%CI)	P-value
Male
Age < 60 years
BMR (kcal/day)
Per SD increase	71 (3.15%)	0.83 (0.66, 1.05)	0.114	0.83 (0.66, 1.05)	0.121	0.95 (0.73, 1.24)	0.713
Quartiles of BMR
Q1 [843, 1112]	3 (2.11%)	Ref		Ref		Ref
Q2 [1120, 1219]	12 (5.22%)	2.38 (0.67, 8.42)	0.180	2.33 (0.66, 8.25)	0.191	2.23 (0.62, 8.04)	0.222
Q3 [1220, 1367]	20 (4.77%)	2.54 (0.75, 8.55)	0.133	2.20 (0.65, 7.41)	0.206	2.36 (0.69, 8.08)	0.170
Q4 [1368, 1789]	36 (2.46%)	1.36 (0.42, 4.41)	0.613	1.25 (0.38, 4.05)	0.716	1.55 (0.47, 5.13)	0.474
P for trend		0.193		0.143		0.634
Age ≥ 60 years
BMR (kcal/day)
Per SD increase	407 (15.65%)	0.62 (0.56, 0.69)	<0.001	0.74 (0.66, 0.83)	<0.001	0.80 (0.70, 0.91)	<0.001
Quartiles of BMR
Q1 [848, 1115]	75 (27.68%)	Ref		Ref		Ref
Q2 [1116, 1218]	98 (20.42%)	0.69 (0.51, 0.93)	0.015	0.79 (0.58, 1.07)	0.124	0.78 (0.58, 1.07)	0.122
Q3 [1220, 1367]	129 (16.02%)	0.53 (0.40, 0.71)	<0.001	0.68 (0.51, 0.90)	0.008	0.71 (0.53, 0.95)	0.022
Q4 [1368, 1788]	105 (10.05%)	0.32 (0.24, 0.43)	<0.001	0.49 (0.36, 0.66)	<0.001	0.60 (0.43, 0.84)	0.003
P for trend		<0.001		<0.001		0.004
Female
Age < 60 years
BMR (kcal/day)
Per SD increase	55 (1.41%)	0.84 (0.56, 1.28)	0.423	0.84 (0.56, 1.27)	0.411	0.91 (0.55, 1.51)	0.723
Quartiles of BMR
Q1 [797, 1115]	15 (1.41%)	Ref		Ref		Ref
Q2 [1116, 1219]	21 (1.53%)	1.05 (0.54, 2.04)	0.880	1.04 (0.54, 2.03)	0.898	1.22 (0.61, 2.44)	0.571
Q3 [1220, 1367]	16 (1.41%)	0.99 (0.49, 1.99)	0.967	0.97 (0.48, 1.97)	0.943	1.10 (0.49, 2.49)	0.811
Q4 [1368, 1771]	3 (0.85%)	0.58 (0.17, 2.01)	0.394	0.57 (0.16, 1.96)	0.369	0.70 (0.17, 2.86)	0.624
P for trend		0.473		0.441		0.755
Age ≥ 60 years
BMR (kcal/day)
Per SD increase	55 (1.41%)	0.74 (0.63, 0.87)	<0.001	0.97 (0.83, 1.13)	0.712	1.05 (0.89, 1.25)	0.550
Quartiles of BMR
Q1 [787, 1115]	152 (9.89%)	Ref		Ref		Ref
Q2 [1116, 1219]	66 (6.84%)	0.68 (0.51, 0.91)	0.010	0.92 (0.69, 1.24)	0.600	0.97 (0.71, 1.33)	0.844
Q3 [1220, 1367]	48 (7.25%)	0.72 (0.52, 1.00)	0.052	1.06 (0.76, 1.48)	0.740	1.23 (0.85, 1.79)	0.268
Q4 [1368, 1761]	10 (5.46%)	0.54 (0.28, 1.02)	0.058	0.71 (0.37, 1.34)	0.287	0.81 (0.42, 1.56)	0.525
P for trend		0.006		0.531		0.911

Abbreviations: BMR, basal metabolic rate; Ref, reference; HR, hazard ratio; CI, confidence interval; SD, standard deviation.

Model I adjusted for age.

Model II adjusted for age, SBP, DBP, BMI, education level, current smokers and drinkers, history of stroke and physical activity levels.