Ice-associated norovirus outbreak predominantly caused by GII.17 in Taiwan, 2015

BMC Public Health

Table 1 Bivariate analysis of food items at 4 March 4 breakfast for gastroenteritis in students (n = 267)

Food items	Ate			Not ate			RR	p value
Food items	Ill	Not Ill	AR	Ill	Not Ill	AR
French Fries	88	78	53%	56	45	55%	0.96	0.70
Carbbage	22	24	48%	122	99	55%	0.87	0.39
Water spinach	7	12	37%	137	111	55%	0.67	0.19
Other vegetables^a	6	8	43%	138	115	55%	0.79	0.44
Scramble eggs	64	54	54%	80	69	54%	1.01	0.93
Pasta	97	87	53%	47	36	57%	0.93	0.55
Tofu	9	10	47%	135	113	54%	0.87	0.58
Toast	61	49	55%	83	74	53%	1.05	0.68
Buns	30	32	48%	101	104	49%	1.06	0.64
Other breads^b	1	8	11%	130	128	50%	0.61	0.30
Pineapple	1	4	20%	130	132	45%	1.11	0.77
Guava	9	9	50%	135	114	54%	0.92	0.74
Other fruits	2	3	40%	142	120	54%	0.74	0.58
Ham	23	11	68%	121	112	52%	1.26	0.07
Sausage	15	10	60%	129	113	53%	1.14	0.42
Orange juice	49	47	51%	95	76	56%	0.92	0.48
Drinking water	19	24	56%	120	104	54%	1.04	0.78
Iced lemon tea	34	18	73%	106	109	49%	1.48	<0.001*
Iced milk tea	54	33	62%	90	90	50%	1.24	0.05*
Iced lemon tea or milk tea	86	45	66%	58	78	43%	1.54	<0.001*

AR Attack Rate, RR Risk Ratio
^aOther vegetables indicates those consumed vegetable other than cabbage and water spinach
^bOther breads indicates those consumed breads other than Chinese steamed buns, round buns and toast.
*The p value is less than 0.05

ISSN: 1471-2458