Can the detection of IgA anti-Mycoplasma pneumoniae added to IgM increase diagnostic accuracy in patients with infections of the lower respiratory airways?

Table 1 Serological profile for anti-Mycoplasma pneumoniae antibodies in patients with of lower respiratory airway infections

Anti-Mycoplasma pneumoniae antibodies profiles				Patients
Group	IgG	IgM	IgA	n (%)	95%CI
A	Negative	Negative	Negative	821 (76.9%)	74.37-79.43
B	Positive	Negative	Negative	143 (13.4%)	11.36-15.44
C	Negative	Positive	Negative	40 (3.7%)	2.57-4.83
D	Negative	Negative	Positive	21 (2.0%)	1.16-2.84
E	Positive	Positive	Negative	13 (1.2%)	0.55-1.85
F	Positive	Negative	Positive	16 (1.5%)	0.77-2.23
G	Negative	Positive	Positive	7 (0.7%)	0.20-1.20
H	Positive	Positive	Positive	6 (0.6%)	0.14-1.06