Table 3.

OASIS13 factor analyses at baseline and 60 days.

	Factor 1 Baseline	Factor 1 60 days	Factor 2 Baseline	Factor 2 60 days	Factor 3 Baseline	Factor 3 60 days
Deep pain	0.47356	0.54669	−0.00400	0.33099	0.57400	0.54904
Stabbing pain	0.10718	0.33016	0.26231	0.74731	0.64746	0.05659
Electric shocks	−0.03058	0.38412	0.50054	0.77767	0.46936	0.09223
Crushing pain	0.69719	0.75040	0.26727	0.10984	0.12409	0.33206
Burning pain	−0.05992	0.25252	0.80063	0.73983	0.07245	0.25069
Tingling in the joint	0.27316	0.04051	0.68678	0.72860	0.26502	0.44906
Pain outside of the joint	0.51829	0.59552	0.45663	0.30945	0.17407	0.43294
Foreign body sensation	0.51403	0.51335	0.52857	0.56016	0.12509	0.02360
Joint stiffness	0.66780	0.67396	−0.07822	0.44439	0.37545	0.13888
Joint swelling	0.70399	0.76303	0.21354	0.28902	−0.12633	0.11995
Pain influenced by weather conditions	0.03995	0.24430	0.07036	0.09660	0.69167	0.87431
Pain without physical activity	0.30131	0.47595	0.27474	0.47708	0.61895	0.47944
Pain-related activity limitation	0.70755	0.71935	−0.16311	0.32097	0.27229	0.31772

Bold entries: items retained in each factor.