Development of Patient-Reported Outcome Scale for Patients with Diabetic Foot and Its Reliability and Validity Test

Figures & data

Table 1 Scale Item Grading

First-Level Items	Second-Level Items	Content
Physiological	01	Do you have any pain in your feet?
	02	Do your feet feel like socks?
	03	Do you have any discharge or fluid around your toenail bed?
	04	Do you have mold on your toes?
	05	Do you have an itching sensation on your feet?
Psychological	06	Do you feel uneasy?
	07	Are you worried that things will get worse?
	08	Can you accept your illness?
	09	Are you afraid of foot ulcers?
	10	Do you feel your health is getting worse?
Social	11	Can your family give you the emotional support you need?
	12	Are you satisfied with your sex life?
	13	Are you still enjoying life?
	14	Does your illness affect your work?
	15	Will your friends be close to you?
	16	Do you still participate in the old leisure activities?
Treatment	17	Have you taken your medicine as the doctor ordered?
	18	Did you self-test your blood sugar as requested by the medical staff?
	19	Have you adjusted your mood according to the medical staff?
	20	Have you been reviewed regularly as required by the medical staff?
	21	Have you been eating properly as instructed by the medical staff?
	22	How do you feel about the treatment?

Table 2 Results of Exploratory Factor Analysis

Item	Factor 1	Factor 2	Factor 3
Item 02	0.823	−0.234	0.002
Item 10	0.816	0.030	−0.321
Item 03	0.702	−0.111	0.309
Item 05	0.697	0.130	−0.234
Item 11	0.684	−0.211	0.031
Item 01	0.573	0.233	−0.101
Item 19	0.565	0.178	−0.334
Item 18	0.554	−0.311	0.190
Item 07	0.446	0.135	−0.211
Item 13	0.433	0.272	0.323
Item 04	0.399	0.562	0.278
Item 21	0.383	0.532	−0.331
Item 06	0.378	0.512	0.235
Item 16	0.372	0.498	−0.234
Item 22	0.356	0.472	0.030
Item 20	0.354	0.440	−0.111
Item 17	0.349	0.432	0.123
Item 08	0.342	0.332	0.534
Item 14	0.323	0.312	0.476
Item 09	0.317	0.308	0.423
Item 15	0.311	0.272	0.419
Item 12	0.309	0.240	0.403

Table 3 Results of Confirmatory Factor Analysis

Parameter	x^2/df	GFI	AGFI	RMSEA	NFI	CFI	IFI
Model of factors	2.813	0.921	0.909	0.071	0.903	0.918	0.921
Reference value	≤3	>0.9	>0.9	≤0.08	>0.9	>0.9	>0.9

Data Sharing Statement

All supporting data can be provided upon request to the authors.