Table 4.

Comparison of severity of symptoms between the two subgroups of IBS-D patients (Group IIA without and Group IIB with tryptophan limitation intake) before and after nutritional intervention; GSRS—Gastrointestinal Symptom Rating Scale; HAM-A—Hamilton Anxiety Rating Scale; HAM-D—Hamilton Depression Rating Scale; average ± SD.

Symptom Score	Group IIA		p-Value	Group IIB		p-Value
	Before	After		Before	After
GSRS	33.4 ± 4.11	20.6 ± 3.10	<0.001	33.3 ± 6.85	16.4 ± 3.16	<0.001
HAM-A	20.2 ± 3.77	12.5 ± 3.59	<0.001	21.8 ± 4.38	11.1 ± 3.01	<0.001
HAM-D	20.4 ± 3.97	16.6 ± 3.55	<0.001	18.8 ± 4.49	11.3 ± 1.76	<0.001