Table 1. Comparison of the demographic data and clinical manifestations of intussusception patients and controls.

Characteristics	Intussusception (n = 126)	Control (n = 106)	P value
Age, yr	1.74 ± 1.20	1.66 ± 1.35	0.622*
Male:female	82:44	65:41	0.499†
Rotavirus vaccination	81 (n = 119)	64 (n = 96)	0.884†
Previous history of intussusception	13 (n = 125)	0 (n = 106)	< 0.001†
Preceding symptoms
Fever	16 (n = 117)	34 (n = 104)	0.001†
Upper respiratory infection‡	28 (n = 117)	22 (n = 104)	0.750†
Acute gastroenteritis§	37 (n = 117)	86 (n = 104)	< 0.001†

^*Using the t-test; ^†Using the χ² test; ^‡Cough, sputum, rhinorrhea; ^§Vomiting, not bloody diarrhea, not colicky abdominal pain.