American Diabetes Association

Table 2—

Factor loadings and descriptive statistics of NeuroQoL

Item	Factors for physical symptoms					Factors for psychosocial symptoms
Item		Factor 1 (pain)	Factor 2 (reduced feeling)	Factor 3 (diffuse sensory motor)	Factor 1 (interpersonal/emotional burden)	Factor 2 (activity limitations)
Burning in your legs or feet	0.75
Excessive heat or cold in your legs or feet	0.63
Pins and needles in your legs or feet	0.75
Shooting or stabbing pain in your legs or feet	0.76
Throbbing in your legs and feet	0.78
Sensations in your legs or feet that make them jump	0.72
Irritation of the skin caused by something touching your feet	0.60
Numbness in your feet		0.79
Inability to feel the difference between hot and cold with your feet		0.91
Inability to feel objects with your feet		0.92
Weakness in your hands			0.65
Problems with balance or unsteadiness while walking			0.90
Problems with balance or unsteadiness while standing			0.88
As a result of foot problems:
Your self-confidence has been affected				0.81
You feel older than your years				0.80
Your life is a struggle				0.79
You feel frustrated				0.79
You feel embarrassed				0.78
You feel depressed				0.72
Foot problems interfere with close relationships				0.72	0.44
As a result of foot problems:
You feel more physically dependent				0.67	0.56
You feel more emotionally dependent				0.70	0.44
Your role in family changed				0.66	0.50
You are treated differently				0.65
Foot problems interfere with:
Ability to perform paid work					0.73
Ability to perform daily tasks					0.76
Ability to take part in leisure activities					0.76
Eingenvalue	6.12	1.86	1.07	8.84	1.26
Percentage of variance explained	47.11	14.28	8.21	58.95	8.38
Valid N	416	416	412	409	416
Scale mean	1.98	2.88	2.28	2.52	2.31
Scale SD	0.89	1.50	1.19	1.38	1.19
Percentage minimum score	14.4	20.4	25.5	28.4	20.70
Percentage maximum score	0.5	19.0	4.4	8.3	1.0
Cronbach’s α	0.88	0.90	0.86	0.90	0.95

Item	Factors for physical symptoms					Factors for psychosocial symptoms
Item		Factor 1 (pain)	Factor 2 (reduced feeling)	Factor 3 (diffuse sensory motor)	Factor 1 (interpersonal/emotional burden)	Factor 2 (activity limitations)
Burning in your legs or feet	0.75
Excessive heat or cold in your legs or feet	0.63
Pins and needles in your legs or feet	0.75
Shooting or stabbing pain in your legs or feet	0.76
Throbbing in your legs and feet	0.78
Sensations in your legs or feet that make them jump	0.72
Irritation of the skin caused by something touching your feet	0.60
Numbness in your feet		0.79
Inability to feel the difference between hot and cold with your feet		0.91
Inability to feel objects with your feet		0.92
Weakness in your hands			0.65
Problems with balance or unsteadiness while walking			0.90
Problems with balance or unsteadiness while standing			0.88
As a result of foot problems:
Your self-confidence has been affected				0.81
You feel older than your years				0.80
Your life is a struggle				0.79
You feel frustrated				0.79
You feel embarrassed				0.78
You feel depressed				0.72
Foot problems interfere with close relationships				0.72	0.44
As a result of foot problems:
You feel more physically dependent				0.67	0.56
You feel more emotionally dependent				0.70	0.44
Your role in family changed				0.66	0.50
You are treated differently				0.65
Foot problems interfere with:
Ability to perform paid work					0.73
Ability to perform daily tasks					0.76
Ability to take part in leisure activities					0.76
Eingenvalue	6.12	1.86	1.07	8.84	1.26
Percentage of variance explained	47.11	14.28	8.21	58.95	8.38
Valid N	416	416	412	409	416
Scale mean	1.98	2.88	2.28	2.52	2.31
Scale SD	0.89	1.50	1.19	1.38	1.19
Percentage minimum score	14.4	20.4	25.5	28.4	20.70
Percentage maximum score	0.5	19.0	4.4	8.3	1.0
Cronbach’s α	0.88	0.90	0.86	0.90	0.95

Note: factor analyses were performed separately on physical and psychosocial items. All loadings ≥0.40 are shown.

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