Table 5.

Mean-square fit statistics for all items in the A-PKQ parent version.

	Outfit (MSQ) 1	Infit (MSQ)		Outfit (MSQ)	Infit (MSQ)
Abdominal Pain			Functional Abdominal Pain Management
ap development	1.06	0.91	nutrition rules	0.66	0.92
children ap	1.03	0.90	occurrence	1.29	1.24
gastro pain	1.06	0.93	fap daily	0.80	0.97
recurrent	1.31	1.20	help fap	0.82	0.86
intolerance	1.10	1.02	move	0.80	0.83
morbus colitis	0.49 *	0.84	relaxation	0.49 *	0.86
Functional Abdominal Pain
fap	0.91	0.95
irritable bowel	1.05	1.03
fap influence	1.01	1.00
microbiome	1.10	1.19
ap origin	0.59	0.81
change fap	0.79	0.84

* Items that exceeded the cut-off for item fit (0.5–1.5). ¹ Mean-square fit statistics: measure the extent of distortion of the measuring system (1.0 is the expected value).