Table 4.

Univariate Analysis and Risk Estimates by Specific Food Items Exposures, by Date of Lunch at the Canteen of the Company Affected by the Enterocytozoon bieneusi Outbreak in Denmark, 2020

Exposure	Exposed			Unexposed				95% CI			% Cases
(Lunch menu)	Total	Cases	AR (%)	Total	Cases	AR (%)	RR	Low	Upper	P-value	Exposed
November 4
Fish and rolled sausage sandwiches	28	10	36	97	23	24	1.5	.8	2.8	.23	19
Egg/shrimp and corned beef sandwiches	32	19	59	86	14	16	3.6	2.1	6.4	.00	37
Fish and roast beef sandwiches	34	9	27	84	21	25	1.1	.5	2.1	1.00	17
Potato and roast beef sandwiches	14	4	29	106	27	26	1.1	.5	2.7	.75	8
Avocado/tomato salad	3	1	33	126	34	27	1.2	.2	6.3	1.00	2
Iceberg salad	10	4	40	112	31	28	1.4	.6	3.3	.47	8
Noodle salad	26	7	27	97	28	29	0.9	.5	1.9	1.00	13
Carrot and raisin salad	28	10	36	88	22	25	1.4	.8	2.6	.33	19
Any (2) fish sandwiches	59	18	31	66	15	23	1.3	.7	2.4	.42	35
Any (2) fish or egg/shrimp sandwiches	72	27	38	51	6	12	3.2	1.4	7.2	.00	52
November 5
Cod roe sandwich	13	3	23	106	29	27	0.8	.3	2.4	1.00	6
Ham and cheese sandwich	43	16	37	77	15	20	1.9	1.1	3.5	.05	31
Smoked turkey sandwich	19	5	26	94	24	26	1.0	5	2.4	1.00	10
Pastrami sandwich	15	6	40	103	23	22	1.8	.9	3.7	.20	12
Broccoli salad	24	7	29	87	21	24	1.2	.6	2.5	.60	13
Baked vegetables salad	9	3	33	107	25	23	1.4	.5	3.8	.45	6
Pumpkin hummus	8	4	50	108	26	24	2.1	1.0	4.5	.20	8
Green salad	10	3	30	100	25	25	1.2	.4	3.3	.71	6
November 6
Pâté tapas	56	16	29	46	8	17	1.6	.8	3.5	.24	44
Pasta salad	14	4	29	81	17	21	1.4	.5	3.5	.50	8
Baked vegetables salad	8	4	50	87	17	20	2.6	1.1	5.8	.07	8
Pineapple salad	20	7	35	75	15	20	1.8	.8	3.7	.23	13
Chocolate cake	43	16	37	59	9	15	2.4	1.2	5.0	.02	31
Tap water (during the 2 weeks)	138	44	32	43	5	12	2.7	1.2	6.5	.01	85
Contact with symptomatic person (last 2 weeks)	10	3	30	182	48	26	1.1	.43	3.02	.73	6

Abbreviations: AR, attack rate; CI, confidence interval; RR, relative risk.