Table 1:

Demographics and Percent Gastric Retention

	All Participants (n=104)	GP (n=52)	Normal Emptying (n=52)	P
Age	12.8 ± 2.9	12.5 ± 2.9*	13.0 ± 2.9	0.39
Sex				0.54
Males	37% (39)^	35% (18)	40% (21)	0.06
Age Groups	5–7 years of age: 3	5–7 years of age: 2	5–7 years of age: 1
	8–12 years of age: 20	8–12 years of age: 12	8–12 years of age: 8
	13–18 years of age: 16	13–18 years of age: 4	13–18 years of age: 12
Females	63% (65)	65% (34)	60% (31)
Age Groups	5–7 years of age: 3	5–7 years of age: 1	5–7 years of age: 2
	8–12 years of age: 23	8–12 years of age: 12	8–12 years of age: 11
	13–18 years of age: 39	13–18 years of age: 21	13–18 years of age: 18
Race				0.12
American Indian or Alaska Native	2% (2)	2% (1)	2% (1)
Asian	0% (0)	0% (0)	0% (0)
Black or African American	6% (6)	2% (1)	10% (5)
White	74% (77)	75% (39)	73% (38)
More than one race	4% (4)	2% (1)	6% (3)
Unknown	13% (14)	19% (10)	8% (4)
BMI Z-score	0.40 ± 1.40	0.1 ± 1.40	0.7 ± 1.40	0.08
Percent Retention
1 hour	79.0 ± 12.5	84.1 ± 7.3	74.0 ± 14.4	<0.01
2 hours	51.1 ± 17.5	63.1 ± 10.4	39.1 ± 14.7	<0.01
3 hours	26.5 ± 14.6	37.9 ± 9.7	15.1 ± 8.5	<0.01
4 hours	10.4 ± 8.9	16.5 ± 8.6	4.4 ± 3.1	<0.01

^*Mean ± SD,

^{^}number,

^#Significant P values (P<0.05) in bold