Table 1.

Baseline characteristics of participants

	Asymptomatic	Symptomatic	p
n	9	8
Males	5	4
Females	4	4
Age	34.6 ± 6.1	30.4 ± 6.6	0.196
Symptom frequency	1.9 ± 0.33	3.9 ± 0.64	< 0.001
Frequency of individual symptoms
Stomach pain	1.8 ± 0.44	2.3 ± 1.0	0.261
Nausea	1.6 ± 0.53	2.1 ± 0.83	0.109
Throwing up	1.3 ± 0.50	1.5 ± 0.53	0.517
Bloating	1.9 ± 0.78	2.4 ± 1.1	0.295
Burping	1.6 ± 0.73	2.3 ± 1.0	0.127
Flatulence	2.1 ± 0.93	3.5 ± 1.1	0.012
Heartburn	1.4 ± 0.73	2.0 ± 1.2	0.259
Liquid in stomach	1.9 ± 0.33	2.5 ± 0.53	0.017
Diarrhea	1.6 ± 0.53	3.8 ± 0.89	< 0.001
Constipation	1.3 ± 0.50	1.3 ± 0.46	0.728
Sum of symptom scores	18.3 ± 3.7	27.4 ± 4.3	< 0.001

1—never experience symptoms; 2—rarely experience symptoms (< 10% of runs); 3—sometimes experience symptoms (50% of runs); 4—often experience symptoms (> 50% of runs); 5—always experience symptoms (> 90% of runs); age and symptom frequencies are listed as means ± standard deviations