Table 4.

Contributions of peak power and force to grip strength and each component of the SPPB.

Outcome	Model1	R2	AIC
Grip strength (kg)	Base model	0.134	349.61
	Base model +power	0.165	340.87
	Base model +force	0.139	349.95
	Base model +power +force	0.166	342.58
SPPB score	Base model	0.021	588.05
	Base model +power	0.076	572.59
	Base model +force	0.100	564.67
	Base model +power +force	0.130	556.52
Gait speed (metres/second)	Base model	0.030	515.45
	Base model +power	0.118	488.77
	Base model +force	0.067	505.78
	Base model +power +force	0.134	485.40
Chair-rise time (seconds)	Base model	0.032	723.58
	Base model +power	0.071	713.19
	Base model +force	0.086	708.43
	Base model +power +force	0.108	703.15
Tandem balance2	Base model	0.008	230.31
	Base model +power	0.089	214.12
	Base model +force	0.036	226.00
	Base model +power +force	0.093	215.34

Base model is adjusted for age, height and co-morbidities.

AIC=Akaike information criterion.

¹Force and power relative to weight.

²Binary outcome, includes pseudo r² results.

NB Power and force were weakly correlated r=0.24.

N=300 for all except chair-rise time (n=299).