Table 6. Item loading for components extracted by factor analysis of LOAD, based on varimax rotated solution.

Factor	Item/topic	Factor loading	Communality
1	6. Activity level at exercise	0.88	0.77
	3: General activity levels	0.81	0.67
	8: Ability to exercise	0.81	0.78
	7: Keenness to exercise	0.67	0.51
	10: Frequency of rest during exercise	0.55	0.42
	1: General demeanor	0.43	0.24
2	12: Stiffness after exercise then rest	0.82	0.74
	9: Effect of exercise on lameness	0.81	0.67
	5: Stiffness after rest	0.69	0.59
	2: Disability caused by lameness	0.69	0.61
	13: Effect of lameness on ability to exercise	0.66	0.73
3	4: Effect of weather on lameness	0.90	0.87
	11: Effect of weather on ability to exercise	0.84	0.82

“Factor loading” is the correlation between the item and factor. Loading values>0.4 indicate good correlation of the item with the factor [31].

“Communality” represents the proportion of the variance for the item that is explained by the factor. A communality value <0.40 may indicate that the item is not related to the other items in that factor [31].