Table 1.

Relationship of Lactulose Breath Test Hydrogen and Methane Production to Abdominal Pain Characteristics and Psychosocial Distress in Children with IBS (n=87). None of the relationships were statistically significant.

Parameter	Mean ± SD	Hydrogen r-Value	Methane r-Value
Abdominal pain episodes/ 2 weeks	15.9 ± 10.9	0.12	−0.1
Mean pain severity (0-10)	3.3 ± 1.1	−0.16	−0.13
Anxiety*	53.9 ± 11.8	−0.1	−0.09
Depression*	48.6 ± 10.0	0.03	−0.01
Child Somatization Inventory Score	29.4 ± 18.3	0.06	−0.14
Functional Disability Inventor Score	13.7 ± 10.3	0.13	−0.2

^*Behavioral Assessment for Children, Second Edition T-score