Table 3.

Characteristics of M. Pneumoniae detection by serology and multiplex-PCR testing

Characteristics		Values of the Cases Tested
		Serology (+) /MX-PCR(+)	Serology (−) /MX-PCR(+)	Serology (+) /MX-PCR (−)	Statistic value	P
		(n = 243)	(n = 19)	(n = 179)
Age (Median)		5.0	1.5	3.0	35.423a	<0.01
Season (n)	Spring	27	2	35	9.150b	0.165
	Summer	42	2	28
	Autumn	53	7	33
	Winter	121	8	83
Sex (n)	Male	142	12	93	2.169b	0.338
	Female	101	7	86

^a Kruskal-Wallis test

^b Pearson Chi-Square