Table 3.

Age distribution of 399 children with positive pathogenic results [number of cases (%)]

Age (year)	Single pathogen infection						2 pathogenic infections						3 pathogenic infections					4 pathogenic infections
	BAT	VIR	MP	F	Sum	BAT + VIR	VIR + MP	BAT + MP	BAT + F	VIR + F	MP + F	Sum	BAT + VIR + MP	BAT + VIR + F	BAT + MP + F	VIR + MP + F	Sum	BAT + VIR + MP + F
< 1	72(67.29)	35(55.56)	8(30.77)	2(100.0)	117	52(65.0)	12(30.0)	14(51.85)	3(50.0)	1(50.0)	0(0)	82	9(32.14)	5(50.0)	0(0)	0(0)	14	2(50.0)
1-3	22(20.56)	21(33.33)	7(26.92)	0(0)	50	21(26.25)	13(32.5)	9(33.33)	2(33.33)	0(0)	0(0)	45	14(50.0)	3(30.0)	0(0)	1(50.0)	18	1(25.0)
4-7	6(5.61)	5(7.94)	7(26.92)	0(0)	18	6(7.50)	15(37.5)	1(3.70)	0(0)	1(50.0)	1(100.0)	24	4(14.29)	1(10.0)	0(0)	0(0)	5	0(0)
8-14	7(6.54)	2(3.17)	4(15.38)	0(0)	13	1(1.25)	0(0)	3(11.11)	1(16.67)	0(0)	0(0)	5	1(3.57)	1(10.0)	1(100.0)	1(50.0)	4	1(25.0)
Sum	107	63	26	2	198	80	40	27	6	2	1	156	28	10	1	2	41	4
P	< 0.001	< 0.001	0.605	0.046	< 0.001	< 0.001	< 0.001	< 0.001	0.217	0.446	0.261	< 0.001	< 0.001	0.118	0.261	0.446	< 0.001	0.446

Data are presented as number (%)

BAT, Bacteria; VIR, Virus; MP, Mycoplasma; F, Fungus;