. Author manuscript; available in PMC: 2021 Apr 6.

Published in final edited form as: Am J Phys Med Rehabil. 2021 Feb 1;100(2):196–201. doi: 10.1097/PHM.0000000000001587

Table 2:

Adjusted associations of baseline flexor and extensor torque variability with changes in outcome measures between baseline and 60-month follow-up. The 2^nd, 3^rd, and 4^th quartiles were compared to the first quartile for significance.

	Knee Flexor Torque Variability				Knee Extensor Torque Variability
Predictor	Pain	Physical Function	Chair Stand	20m Walk	Pain	Physical Function	Chair Stand	20m Walk
2^nd quartile ß estimate±SE	0.12±0.17^*	−0.05±0.58	0.14±0.19	0.12±0.17	−0.04±0.18	−0.40±0.59	0.32±0.20	0.15±0.17
3^rd quartile ß estimate±SE	0.08±0.18	0.20±0.59	0.41±0.20^{^}	0.08±0.17	0.10±0.18	−0.03±0.59	0.38±0.20	0.09±0.17
4^th quartile ß estimate±SE	.60±0.18^*	2.03±0.60^*	0.36±0.21	0.58±0.18^*	0.23±0.18	0.41±0.60	0.39±0.20	0.10±0.17
R²	0.27	0.24	0.19	0.13	.27	0.23	0.19	0.13
p-for-trend across quartiles	0.0022	0.0011	0.0361	0.0026	0.1506	0.4003	0.0537	0.6405

= p <0.01,

^{^}

=p<0.05.