Effects of body mass index on gastric motility: Comparing children with functional abdominal pain disorders and healthy controls

Table 1 Comparison of gastric motility parameters in children with functional abdominal pain disorders and controls according to lower and higher body mass index

Motility parameter	FAPDs			Controls
	BMI < 15 kg/m2 (n = 109)	BMI ≥ 15 kg/m2 (n = 67)	P value1	BMI < 15 kg/m2 (n = 31)	BMI ≥ 15 kg/m2 (n = 32)	P value1
Fasting antral area (cm2)	2.12	2.71	0.008	1.65	2.16	0.058
Antral area in 1 min (cm2)	10.68	12.57	0.004	9.93	12.61	0.001
Antral area in 15 min (cm2)	6.13	7.19	0.009	4.03	4.95	0.088
Gastric emptying rate (%)	43.01	40.26	0.240	59.64	59.37	0.947
Frequency of antral contraction (3 min)	8.52	8.48	0.809	9.61	9.33	0.152
Amplitude of antral contraction (%)	43.21	46.28	0.117	61.93	61.25	0.868
Antral motility index	3.68	3.98	0.125	5.83	5.78	0.903

¹Independent samples t-test. BMI: Body mass index; FAPDs: Functional abdominal pain disorders.

Table 2 Correlation of body mass index and gastric motility parameters in children with functional abdominal pain disorders and controls

Motility parameter	FAPDs (n = 176)		Controls (n = 63)
	r	P value	r	P value
Fasting antral area	0.183	0.015	0.234	0.065
Antral area at 1 min	0.143	0.059	0.332	0.008
Antral area at 15 min	0.190	0.011	0.227	0.074
Gastric emptying rate	-0.137	0.071	-0.049	0.704
Frequency of antral contractions	0.014	0.858	-0.208	0.103
Amplitude of antral contractions	0.130	0.086	-0.016	0.900
Antral motility index	0.132	0.081	-0.076	0.552

r: Pearson correlation coefficient; FAPDs: Functional abdominal pain disorders.

Table 3 Correlation of body mass index and gastric motility parameters according to the functional abdominal pain disorders subtypes

Motility parameter	IBS (n = 39)		FAP (n = 97)		FD (n = 25)		AM (n = 15)
	r	P value	r	P value	r	P value	r	P value
Fasting antral area	0.177	0.280	0.011	0.915	0.446	0.025	0.513	0.050
Antral area at 1 min	0.136	0.410	0.062	0.545	0.304	0.140	0.564	0.028
Antral area at 15 min	0.115	0.486	0.083	0.420	0.642	0.001	0.351	0.199
Gastric emptying rate	0.027	0.873	-0.082	0.427	-0.592	0.002	0.065	0.819
Frequency of antral contractions	0.137	0.404	0.040	0.698	-0.284	0.170	-0.172	0.539
Amplitude of antral contractions	0.144	0.381	0.263	0.009	-0.510	0.009	0.160	0.568
Antral motility index	0.204	0.213	0.254	0.012	-0.489	0.013	0.003	0.992

IBS: Irritable bowel syndrome; FAP: Functional abdominal pain not otherwise specified; FD: Functional dyspepsia; AM: Abdominal migraine; r: Pearson correlation coefficient.