Chart 3. Characterization of instruments found in the scoping review, Fortaleza, Ceará, Brazil, 2022.

Instrument name	Dimensions and items	Answer	Language	Psychometric measures
Summary of DiabetesSelf-Care Activities (SDSCA)( 17 ) Version of the Summary of Diabetes Self-Care Activities measure (SDSCA-G)( 18 )	- General diet - Specific diet - Exercises - Blood glucose test - Foot care - Cigarette use - Medications 11 items	Likert	English	Correlation: r =0.2 - 0.76
			Version German from SDSCA	Cronbach’s alpha = 0.607 Correlation: Rho = 0.644 Χ2 = 0.095
Questionário de Atividades de Autocuidado com o Diabetes (QAD)( 19 )	- General food - Specific food - Physical activity - Blood glucose monitoring - Foot care - Medication use - Smoking 17 items	Likert	Version Brazilian of SDSCA	Cronbach’s alpha = 0.86. Correlation: r = 0.29 -1.00
Questionnaire on skills and self-care activities of patient with diabetic foot( 20 )	- Personal data and relatives - Self-care capacity - Foot self-care 20 items	Likert	Peruvian Spanish	- Missing from the article
The social-support scale for self-care in middle-aged patients with type 2 diabetes (S4-MAD)( 21 )	- Social support for nutrition activities - Physical activity - Blood glucose Self-monitoring - Foot care - Smoking 30 items	Alternative (yes/no)	Iran English	Cronbach’s alpha = 0.94 Correlation: Χ 2: 2.03 R = 0.87 (intraclass) KMO = 0.92
Questionário de Atividades de Autocuidado com os Pés para Diabéticos (QPED)( 22 )	- Health service - Social support - Foot self-care compliance 14 items	Alternatives	Portuguese	CVI = 0.86 Cronbach’s alpha =0.76
Questionário do Comportamento Planeado na Diabetes – Cuidado Com os Pés (QCP-CP)( 23 )	- Intentions (2) - Attitudes (5) - Subjective standards (3) - Behavioral control perceived (4) - Action planning (4) - Coping planning (4) 22 items	Scores	Spanish	Cronbach’s alpha = 0.675 CCI=0.675 KMO: 0.741
Diabetes foot self-care behavior scale (DFSBS)( 24 )	- Foot inspection - Washing - Drying - Finger inspection - Lotion application - Shoe use 7 items	Likert and alternatives	Chinese	Cronbach’s alpha = 0.73 Kappa: 0.87 Correlation: Rho =0.87 R= 0.45
Frankfurter Catalogueof Foot Self-Care – Prevention of the Diabetic Foot Syndrome (FCFSP)( 25 )	- Professional assistance in foot care - Self-control of the feet - Self-control of shoes and socks - 19 items	Likert	German	Cronbach’s alpha = 0.84
Foot Care ConfidenceS cale (FCCS)( 26 ) Foot Care ConfidenceS cale/Foot-Care Behavior (FCCS-FCB)( 27 )	- Self-efficacy (12) - Preventive self-care behaviors (9) - Risky self-care behaviors (8) 29 items	Likert and alternatives	English Mexican version of FCCS	CVI: 1 α = 0.92 KMO = 0.758
The diabetic foot self-care questionnaire of the University of Malaga, Spain (DFSQUMA)( 28 ) The diabetic foot self-care questionnaire of the University of Malaga, French (DFSQ-UMA Fr)( 29 )	- Foot care - Shoe care - Sock care 16 items	Likert	Spanish Version in French	CVI >0.75 Cronbach’s alpha = 0.89 Kappa = 0.84 Correlation: r = 0.34 KMO: 0.89 Cronbach’s alpha = 0.922 Kappa = 0.84 Correlation: r = 0.48 (items) r = 0.89 (intraclass) KMO = 0.89
Diabetes Foot Diseaseand Foot Care (DFDFC-Q)( 30 )	- Diabetes-related foot diseases - Relaxation - Foot self-care - Shoes - Foot care education - Professional foot care 12 items	Likert	English	Cronbach’s alpha =0.672
Modified Diabetic FootC are Knowledge (MDFCK)( 31 )	- DM management (5) - Prevention of foot injuries (2) - Foot condition (2) - Foot hygiene (3) - Appropriate footwear (2) - Toenail care (1) 15 items	Alternative: correct/wrong	Indonesia	Internal consistency Kr-20: 0.75
Modified Diabetic Foot Care Behaviours (MDFCB)( 31 )	- General DM management (4) - Foot condition (4) - Foot hygiene (4) - Shoes (11) - Foot moisturizer (2) - Nail care (5) - Prevention of foot injuries (1) - Treatment of foot injuries (3) 34 items	Score	Indonesia	Cronbach’s alpha = 0.81.

CVI - Content Validity Index; r - Pearson’s r; rho - Spearman’s rho; χ² - Chi-Square; KR – Kuder-Richardson; KMO - Kaiser-Meyer-Olkin; DM – Diabetes Mellitus.