TABLE 5.

Comparison of measured total energy expenditure with predicted total energy expenditure based on physical activity coefficient prediction equations (reported in Table 4)

Age class	Activity category	Males (n = 638)							Females (n =1019)
					Regression1						Regression1
		rc	LOA2		Intercept	Slope	rs	MAPE	rc	LOA2	Intercept	Slope	rs	MAPE
			(%)		kJ/d			(%)		(%)	kJ/d			(%)
All participants (≥65 y)	Prediction based on age, weight, and height
	Overall mean PA coefficient	0.63	3009 (±30.3)		3633	0.64	0.67	9.7	0.65	2362 (±30.1)	2810	0.66	0.66	10.1
	Stratified by PA coefficient	0.87	1953 (±20.0)		1054	0.89	0.87	5.8	0.83	1755 (±21.8)	1275	0.85	0.83	7.1
	Stratified by age category and mean PA coefficient	0.69	3019 (±30.2)		3850	0.63	0.66	10.1	0.65	2354 (±29.8)	2850	0.65	0.66	9.9
	Stratified by age and PA coefficient	0.88	1918 (±19.5)		992	0.90	0.87	5.7	0.84	1736 (±21.5)	1226	0.85	0.83	6.9
	Prediction based on age, weight, height, and RMR
	Overall mean PA coefficent	0.68	2845 (±28.4.0)		3033	0.70	0.70	9.1	0.68	2269 (±28.7)	2521	0.69	0.69	9.8
	Stratified by PA coefficient	0.96	1053 (±10.3)		226	0.99	0.96	4.0	0.97	842 (±10.6)	185	0.98	0.96	3.9
	Stratified by age category and mean PA coefficient	0.68	2772 (±27.5)		2938	0.71	0.71	9.3	0.69	2263 (±28.5)	2577	0.68	0.69	9.9
	Stratified by age and PA coefficient	0.97	1040 (±10.1)		197	0.98	0.97	3.8	0.97	830 (±10.5)	191	0.98	0.96	3.9

LOA, limit of agreement; MAPE, median absolute percentage error; PA, physical activity (see text and Table 4).

¹Regression = measured TEE versus predicted; r_c = Lin’s concordance correlation coefficient; r_s = Spearman correlation coefficient.

²LOA = 1.96 SD limits of agreement.