Table I.

Characteristics of participants stratified by children vaccinated and not vaccinated against rotavirus

Parameter		Number and percentage of children				P-value
		Non-vaccinated (N = 303)		Vaccinated with Rotarix (N = 303)
		N	%	N	%
Gender	Male	154	50.8	154	50.8	NS
	Female	149	49.2	149	49.2
Living place	Rural area	179	59.1	169	55.8	< 0.001
	Small city	118	38.9	105	34.6
	Big city (> 100 000 inhabitants)	6	2.0	29	9.6
Pregnancy	Single	294	97.0	301	99.3	0.063
	Multiple	9	3.0	2	0.7
Mother's education	Elementary	9	3.0	0	–	< 0.001
	Vocational	50	16.6	29	9.7
	Higher	122	40.4	102	34.0
	University	121	40.0	169	56.3
Father's education	Elementary	12	4.0	9	3.0	0.002
	Vocational	107	35.7	64	21.4
	Higher	114	38.0	126	42.2
	University	67	22.3	100	33.4
Other children in the family		194	64.0	160	53.0	0.007
Number of children living in the same flat	1	136	69.4	129	80.1	0.022
	2	39	19.9	26	16.2
	3	15	7.6	6	3.7
	4 or more	6	3.1	0	0.0
Siblings vaccinated against rotaviruses		8	3.8	49	31.8	< 0.001
Birth weight	< 2500 g	14	4.6	10	3.4	NS
Breast feeding	No	23	7.9	23	7.8	NS
	≤ 6 months	109	30.8	91	31.1
	> 6 months	160	61.3	179	61.1
Age, mean ± SD [years]		2.86 ±1.22		2.63 ±1.09		0.010