Adaptation and psychometric evaluation of the breastfeeding self-efficacy scale to assess exclusive breastfeeding

Table 4 Model Fit Indices of Factor Extraction at 1 month postpartum and test of dimensionality at 3 months postpartum

Factor Extraction (n = 239)
Rotation	Analytical Technique	AIC¹	BIC²	χ2³	df ⁴	RMSEA⁵	CFI⁶	TLI⁷	SRMR⁸
Geomin Oblique Rotation	EFA ⁹ (11 items)
Eigenvalues	4.29, 1.40, 1.01
	One-factor model	7747.46	7862.18	344.64	44	0.17	0.70	0.62	0.08
	Two-factor model	7521.89	7671.38	99.07	34	0.09	0.93	0.89	0.06
Test of Dimensionality (n = 238)		AIC	BIC	χ2	df	RMSEA	CFI	TLI	WRMR ¹⁰
Geomin Oblique Rotation (Initial CFA test)	CFA ¹¹ (2 factors)	5837.01	5934.11	90.62	26	0.10	0.94	0.91	0.61
After re-specification (Geomin Oblique Rotation)	CFA (2 factors)	5808.44	5912.48	58.05	24	0.08	0.97	0.95	0.60

Notes: ¹AIC = Akaike, ²BIC = Bayesian, ³χ2 = chi-square goodness of fit statistic; ⁴df = degrees of freedom; ⁵RMSEA (≤0.08) = Root Mean Square Error of Approximation; ⁶CFI (≥0.95) = Comparative Fit Index; ⁷TLI (≥0.95) = Tucker Lewis Index; ⁸SRMR (≤0.08) = Standardized Square Root Mean Residual; ⁹EFA = Exploratory Factor Analysis; ¹⁰WRMR (≤1.0) = Weighted Root Mean Square Residual; ¹¹CFA = Confirmatory Factor Analysis; All goodness-of-fit tests were statistically significant at p < 0.0001