Psychometric properties of the adapted instrument European Health Literacy Survey Questionnaire short-short form

Fábio Luiz Mialhe Corresponding author: Fábio Luiz Mialhe E-mail: mialhe@unicamp.br https://orcid.org/0000-0001-6465-0959

Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Piracicaba, SP, Brazil.

Katarinne Lima Moraes

Universidade Federal de Jataí, Curso de Enfermagem, Jataí, GO, Brazil.

Fernanda Maria Rovai Bado

Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba, Piracicaba, SP, Brazil.

Secretaria Municipal de Saúde, Piracicaba, SP, Brazil.

Virginia Visconde Brasil

Universidade Federal de Goiás, Faculdade de Enfermagem, Goiânia, GO, Brazil.

Helena Alves De Carvalho Sampaio

Universidade Estadual do Ceará, Benfica, Fortaleza, CE, Brazil.

Flávio Rebustini

Universidade de São Paulo, Escola de Artes, Ciências e Humanidades, São Paulo, SP, Brazil.

Authors’ Contribution:

Study concept and design: Fábio Luiz Mialhe, Katarinne Lima Moraes, Fernanda Maria Rovai Bado, Virginia Visconde Brasil, Helena Alves De Carvalho Sampaio, Flávio Rebustini. Obtaining data: Katarinne Lima Moraes, Fernanda Maria Rovai Bado, Virginia Visconde Brasil, Helena Alves De Carvalho Sampaio. Data analysis and interpretation: Fábio Luiz Mialhe, Flávio Rebustini. Statistical analysis: Flávio Rebustini. Drafting the manuscript: Fábio Luiz Mialhe, Katarinne Lima Moraes, Fernanda Maria Rovai Bado, Virginia Visconde Brasil, Helena Alves De Carvalho Sampaio, Flávio Rebustini. Critical review of the manuscript as to its relevant intellectual content: Fábio Luiz Mialhe, Katarinne Lima Moraes, Fernanda Maria Rovai Bado, Virginia Visconde Brasil, Helena Alves De Carvalho Sampaio, Flávio Rebustini

All authors approved the final version of the text.

Conflict of interest: the authors have declared that there is no conflict of interest.

ITEM	UNICO^* * UNICO = Unidimensional Congruence;			ECV^† † ECV = Explained Common Variance;			MIREAL^‡ ‡ MIREAL = Mean of item residual absolute loadings
ITEM	Sample 1	Sample 2	Complete Sample	Sample 1	Sample 2	Complete Sample	Sample 1	Sample 2	Complete Sample
ITEM 1	0.93	0.98	0.98	0.72	0.83	0.85	0.52	0.28	0.30
ITEM 2	0.99	0.99	0.98	0.95	0.87	0.86	0.15	0.33	0.29
ITEM 3	1.00	0.98	0.99	0.99	0.86	0.96	0.05	0.28	0.13
ITEM 4	0.99	0.99	1.00	0.92	0.91	0.98	0.21	0.21	0.10
ITEM 5	0.99	0.98	0.99	0.93	0.85	0.90	0.17	0.30	0.22
ITEM 6	0.98	0.99	0.98	0.84	0.88	0.85	0.35	0.32	0.35

ITEM	Factorial load (λ)			Commonalities (h2)			Item breakdown (a)
ITEM	Sample 1	Sample 2	Complete Sample	Sample 1	Sample 2	Complete Sample	Sample 1	Sample 2	Complete Sample
ITEM 1	0.76	0.64	0.72	0.58	0.41	0.52	1.17	0.83	1.04
ITEM 2	0.67	0.83	0.72	0.45	0.68	0.52	0.91	1.48	1.04
ITEM 3	0.67	0.68	0.70	0.45	0.47	0.49	0.91	0.94	0.99
ITEM 4	0.75	0.72	0.75	0.56	0.52	0.56	1.13	1.04	1.14
ITEM 5	0.68	0.72	0.68	0.46	0.52	0.46	0.92	1.04	0.92
ITEM 6	0.80	0.84	0.83	0.64	0.72	0.67	1.34	1.61	1.44

Indices	Sample 1	Sample 2	Complete Sample
Eigenvalue (r)^* * r = Eigenvalues by the correlation;	2.70	2.72	2.70
Eigenvalue (cov)^† † cov = Eigenvalues by the variance;	1.11	1.14	1.12
Factorial loads	0.55 to 0.60	0.51 to 0.67	0.53 to 0.64
R2^‡ ‡ R2 = Item prediction level	0.30 to 0.37	0.26 to 0.45	0.28 to 0.41
Residuals	-0.018 to 0.019	-0.033 to 0.051	-0.021 a 0.022
Standard error	0.029 a 0.036	0.019 a 0.030	0.021 a 0.026

	Index	Technique	Sample 1	Sample 2	Complete Sample
Exploratory	Adequacy of correlation matrix	Determinant of the matrix Bartlett	0.19	0.17	0.19
		Determinant of the matrix Bartlett	314.0 (df = 15)	342.8 (df = 15)	636.3 (df = 15)
		KMO (Kaiser-Meyer-Olkin)	0.82	0.82	0.84
	Explained Variance (Kaiser Criterion)		60.39%	62.68%	61.63%
	Explained Variance (AP)		69.92%	68.95%	71.23%
	Polychoric Correlation (rp = )		0.39 a 0.68	0.37 a 0.69	0.40 a 0.65
	Robust Mean-Scaled Chi Square (X2/df = 56)		20.19 (df = 9)*	22.69 (df = 9)*	22.54 (df = 9)*
Confirmatory	Non-Normed Fit Index (NNFI)		0.97	0.97	0.98
	Comparative Fit Index (CFI)		0.98	0.98	0.99
	Goodness of Fit Index (GFI)		0.99	0.98	0.99
	Adjusted Goodness of Fit Index (AGFI)		0.98	0.97	0.99
	Root Mean Square Error of Approximation (RMSEA)		0.08	0.08	0.06
Reliability	Root Mean Square of Residuals (RMSR)		0.05	0.08	0.05
	Standardized Cronbach's Alpha		0.86	0.87	0.87
	McDonald's Omega		0.86	0.88	0.87
	Construct Reliability - Index G H (Latente e observada)		(0.87; 0.78)	(0.89; 0.77)	(0.88; 0.79)
Unidimensionality	Unidimensional Congruence (UNICO)		0.98	0.98	0.99
	Explained Common Variance (ECV)		0.86	0.87	0.89
	Mean of item residual absolute loading (MIREAL)		0.24	0.29	0.23
Quality and effectiveness	Factor Determinacy Index (FDI)		0.93	0.94	0.88
	EAP Marginal Reliability		0.87	0.89	0.93
	Sensivity Ratio (SR)		2.64	2.92	2.72
	Expected percentage of true differences (EPTD)		91.4%	92.3%	91.6%

Brasil