Etiological analysis of virus, mycoplasma pneumoniae and chlamydia pneumoniae in hospitalized children with acute respiratory infections in Huzhou

Table 1 Demographic data of the hospitalized children admitted with ARIs

Variable	Total N = 3121 (%)	Single infection N = 399 (%)	coinfections N = 52 (%)
Age groups (years)
Infants	414 (13.26%)	78 (18.84%)	10 (2.42%)
Toddlers	969 (31.05%)	126 (13.00%)	13 (1.34%)
Preschoolers	987 (31.62%)	113 (11.45%)	21 (2.13%)
Schoolchildren	751 (24.06%)	82 (10.92%)	8 (1.07%)
Total	3121	399 (12.78%)	52 (1.67%)
χ² (P)		17.583 (0.001)	4.980 (0.173)
Gender
Male	1753	240 (13.69%)	29 (1.65%)
Female	1368	159 (11.62%)	23 (1.68%)
χ² (P)		2.947 (0.086)	0.003 (0.953)

The overall detection rate decreased with the increase of the age of enrolled children infected by single pathogen. There were significant differences in the detection rates of pathogens among the four groups (χ² = 17.583, p = 0.001), while there was no significant difference in the coinfections among the four groups. There was no difference in different genders in single infection and coinfections