Table 4.

Results of the univariate analysis for the consumption of tap water, various foodstuffs and tap water estimators (proxies), cohort study, town in Northern Greece, January–February 2019

	Cases		Non- cases
Risk factor	n	(AR%)	n	(AR%)	RR	95% CIa	P-value
Consumption of tap water	104/169	62	15/54	28	2.22	1.42–3.46	<0.001
Consumption of bottled water	23/72	32	90/139	65	0.49	0.34–0.71	<0.001
Use of water for fruit/vegetable washing	110/196	56	4/10	40	1.40	0.65–3.03	0.317
Use of water for ice cube preparation	25/51	49	82/148	55	0.88	0.65–1.21	0.430
Use of water for juice dilution	4/9	44	103/190	54	0.82	0.39–1.72	0.566
Use of filter	31/50	62	84/157	54	1.16	0.89–1.51	0.292
Consumption of milk	90/157	57	23/41	56	1.02	0.76–1.38	0.888
Consumption of cold cuts	44/94	47	70/110	64	0.74	0.57–0.95	0.016
Consumption of seafood	6/9	67	108/193	56	1.19	0.74–1.92	0.527
Consumption of fresh vegetables	60/105	57	50/88	57	1.01	0.79–1.29	0.964
Consumption of pasta/rice	76/127	60	34/65	52	1.14	0.87–1.50	0.318
Consumption of fish	10/17	59	104/184	57	1.04	0.69–1.58	0.855
Consumption of dairy products	70/121	58	42/74	57	1.02	0.79–1.31	0.881
Consumption of eggs	38/71	54	79/134	59	0.91	0.70–1.18	0.455
Consumption of sweet	49/87	56	61/105	58	0.97	0.76–1.24	0.805
Consumption of canned food	9/16	56	99/175	57	0.99	0.63–1.56	0.980
Consumption of meat	68/116	59	47/85	55	1.06	0.83–1.35	0.638
Consumption of chicken	30/61	49	82/139	59	0.83	0.62–1.11	0.198
Consumption of snacks	28/50	56	79/137	58	0.97	0.73–1.29	0.839
Consumption of fruits	75/139	54	38/58	66	0.82	0.65–1.05	0.135
Consumption of shellfish	0/2	0	114/199	57	0,00	–	0.104

^aRR, relative risk; CI: confidence interval.