Table 2:

Correlations Between PBMC Bioenergetics (Spare Respiratory Capacity, Maximal Respiration, and Bas al Respiration) with Physical Function, Strength, Lean Mass, Muscle Quality, and Interleukin-6

	Spare Respiratory Capacity		Maximal Respiration		Basal Respiration
Correlation	r	p-value	r	p-value	r	p-value
Expanded Short Physical Performance Battery
Pearson	0.59	0.02*	0.58	0.02*	0.50	0.06^
Partial (age)	0.59	0.02*	0.59	0.02*	0.50	0.07^
Partial (sex)	0.55	0.04*	0.55	0.04*	0.46	0.10^
Partial (BMI)	0.59	0.02*	0.59	0.03*	0.49	0.07^
Partial (IL-6)	0.62	0.04*	0.63	0.04*	0.57	0.07^
Knee Extensor Strength
Pearson	0.60	0.02*	0.60	0.02*	0.51	0.05*
Partial (age)	0.61	0.03*	0.59	0.03*	0.47	0.10^
Partial (sex)	0.66	0.01**	0.65	0.01**	0.55	0.05*
Partial (BMI)	0.63	0.02*	0.62	0.02*	0.53	0.06^
Partial (IL-6)	0.55	0.08^	0.56	0.08^	0.50	0.11
Grip Strength
Pearson	0.54	0.04*	0.52	0.05*	0.40	0.13
Partial (age)	0.59	0.04*	0.59	0.04*	0.49	0.10^
Partial (sex)	0.53	0.05*	0.51	0.06^	0.35	0.21
Partial (BMI)	0.57	0.03*	0.57	0.03*	0.52	0.06^
Partial (IL-6)	0.54	0.08^	0.54	0.09^	0.45	0.17
Leg Lean Mass
Pearson	0.23	0.42	0.18	0.53	−0.02	0.96
Partial (age)	0.18	0.55	0.13	0.68	−0.07	0.82
Partial (sex)	0.29	0.34	0.23	0.46	0.01	0.98
Partial (BMI)	0.20	0.51	0.17	0.57	0.05	0.86
Partial (IL-6)	−0.00	0.99	−0.03	0.92	−0.12	0.72
Leg Muscle Quality
Pearson	0.56	0.04*	0.51	0.06^	0.29	0.31
Partial (age)	0.54	0.06^	0.48	0.10^	0.23	0.45
Partial (sex)	0.49	0.09^	0.44	0.13	0.21	0.48
Partial (BMI)	0.55	0.05*	0.52	0.07^	0.33	0.26
Partial (IL-6)	0.50	0.12	0.47	0.14	0.33	0.32
Plasma Interleukin-6
Pearson	−0.55	0.05*	−0.58	0.04*	−0.61	0.03*
Partial (age)	−0.61	0.03*	−0.64	0.03*	−0.63	0.03*
Partial (sex)	−0.60	0.04*	−0.65	0.02*	−0.69	0.01*
Partial (BMI)	−0.53	0.08^	−0.56	0.06^	−0.59	0.04*

Notes: N=13–15; SPPB = Short Physical Performance Battery; BMI = body mass index

^{^}p≤0.1,

^*p≤0.05,

^**p≤0.01