TABLE 3.

Confirmatory analysis of the 17 IGQ items retained

	Whole sample	GPop	IBS	UK	FR	SP
Comparative Fit Index (CFI)	0.923	0.918	0.913	0.940	0.905	0.879
RMSEA	0.068	0.075	0.067	0.064	0.073	0.092
SRMR	0.053	0.053	0.070	0.068	0.084	0.068

Parameters for good fit of models. Cut‐off for good fit, Comparative Fit Index (CFI ≥ 0.9), Root Mean Square Error of Approximation (RMSEA < 0.08), Standardized Root Mean Square Residual (SRMR < 0.08).

Abbreviations: GPop, General Population; IBS, Irritable Bowel Syndrome.