Table 2.

Physical functional measures across the clusters.

	Cluster 1 Highest Function Minimal Movement-Evoked Pain (n=145)	Cluster 2 Moderate Function Mild Movement-Evoked Pain (n=101)	Cluster 3 Lowest Function Severe Movement-Evoked Pain (n=24)	p-value
Chair Stand Score, mean ± SD	2.9 ± 1.1	2.0 ± 1.3	1.5 ± 1.1	<0.0001
Pain Chair Stand, mean ± SD	4.5 ± 5.4	31.7 ± 17.8	75.7 ± 25.2	<0.0001
Gait Score, mean ± SD	3.7 ± 0.7	3.6 ± 0.8	3.0 ± 1.0	0.001
Pain Gait, mean ± SD	2.2 ± 3.5	24.4 ± 15.5	73.8 ± 16.0	<0.0001
Balance, mean ± SD	3.9 ± 0.3	3.8 ± 0.6	3.6 ± 0.7	0.012
Pain Balance, mean ± SD	1.8 ± 2.6	22.3 ± 14.2	72.7 ± 16.8	<0.0001
SPPB Total Score*	10.5 ± 1.5	9.4 ± 1.9	8.0 ± 2.0	<0.0001

^*SPPB Total Score was NOT entered into the clustering procedure