Table 2.

Factor Analyses Using Polychoric Correlations of Performance Tests, Self-Report Items, and All Measures Combined.

	Performance tests	Self-report items	All measures
Performance tests and self- report items	Factor loading	Factor loading	Factor loading
Total (N)	6,109	7,475	6,006
Performance tests
Balance	0.750	–	0.739
Walking speed	0.771	–	0.756
Repeated chair stand	0.729	–	0.734
Grip strength	0.575	–	0.590
Peak air flow	0.648	–	0.609
Self-report items
Walking 6 or 3 blocks	–	0.918	0.908
Climbing 20 or 10 stairs	–	0.922	0.902
Lifting 20 or 10 pounds	–	0.929	0.923
Bending or kneeling	–	0.830	0.790
Reaching or stretching	–	0.888	0.854
Grasping or gripping	–	0.662	0.624
1st eigenvalue	2.44	4.47	6.61
2nd eigenvalue	0.22	0.13	0.48
Ratio of eigenvalue (1st and  2nd factors)	11.09	34.38	13.77