Development and Validation of the EXPECT Questionnaire: Assessing Patient Expectations of Outcomes of Complementary and Alternative Medicine Treatments for Chronic Pain

doi:10.1089/acm.2016.0242

Table 3.

Fit Indexes for the Exploratory and Confirmatory Factor Analyses in the Community Sample and the Clinical Trials Samples

Exploratory analyses: community sample (17 items)			Confirmatory analysis: clinical trials, one-factor solution (10 items)
	One-factor solution (n = 141)	Two-factor solution (n = 141)		BTH yoga study (n = 55)	MAP study (n = 41)	POYSE study (n = 85)
Total % variance explained	0.62	0.71	Total % variance explained	0.61	0.65	0.74

Chi-square	926.7	527.8	SRMSR	0.07	0.05	0.05

Chi-square df	119	103	ML chi-square	124.9	57.0	141.2

p-Value	<0.001	<0.001	Chi-square df	35	35	35

RMSEA (90% CI)	0.23 (0.21–0.23)	0.18 (0.16–0.19)	ML chi-square p-value	<0.001	0.01	<0.001

RMSR	0.10	0.05	ML RMSEA (90% CI)	0.22 (0.18–0.26)	0.12 (0.06–0.18)	0.19 (0.16–0.22)

TLI	0.65	0.79	ML TLI	0.75	0.92	0.86

BIC	337.8	18.1	ML CFI	0.81	0.94	0.89
			Robust chi-square	54.36	49.90	80.18
			Robust chi-square p-value	0.02	0.049	<0.001
			Robust RMSEA (90% CI)	0.10 (0.06–0.13)	0.10 (0.02–0.16)	0.12 (0.10–0.15)
			Robust TLI	0.93	0.87	0.92
			Robust CFI	0.94	0.90	0.94

BIC, Bayesian information criterion; CFI, comparative fit index; CI, confidence interval; df, degrees of freedom; ML, maximum likelihood; RMSEA, root mean square error of approximation; SRMSR, standardized root mean square residual; TLI, Tucker–Lewis index.