Table 3. Analysis of covariance (ANCOVA) between hand grip, CoQ₁₀/cholesterol ratio, age and BMI in A) the basic study population (n = 334) and B) the validation population (n = 967), including 658 overweight/obese subjects.

Source	Type III sum of Squares	df	F	Significance	Partial η2
A) Basic study population
Corrected Model	1,477a	3	3.24	0.022	0.029
Intercept	6491	1	42.7	<0.001	0.115
CoQ10/cholesterol	416	1	2.74	0.099	0.008
Age	50.9	1	0.336	0.563	0.001
BMI	872	1	5.74	0.017	0.017
B) Validation population
Corrected Model	4,049b	3	10.8	<0.001	0.033
Intercept	28,617	1	230.1	<0.001	0.193
CoQ10/cholesterol	2,266	1	18.2	<0.001	0.019
Age	2164	1	17.4	<0.001	0.018
BMI	2.13	1	0.017	0.896	<0.001

^aR² = _0.033 (Adjusted R² = _0.030), dependent variable: hand grip, independent covariate: age, CoQ₁₀/cholesterol, BMI

^bR² = _0.029 (Adjusted R² = _0.020), dependent variable: hand grip, independent covariate: age, CoQ₁₀/cholesterol, BMI

BMI = body mass index; df = degrees of freedom, F = variance ratio