Table 2

 Seropositivity for Chlamydia pneumoniae, Helicobacter pylori, cytomegalovirus, and herpes simplex virus types 1 and 2 in patients and controls

Antibody responsePatients (n = 227)Controls (n = 277)p Value
n (%).
C pneumoniae (IgG)117 (52.0)136 (50.6)0.20
C pneumoniae (IgA)122 (54.2)136 (50.7)0.44
C pneumoniae (IgM)8 (1.8)15 (1.5)0.29
H pylori (IgG)139 (62.3)162 (61.4)0.80
Cytomegalovirus (IgG)103 (45.8)104 (38.7)0.10
Herpes simplex (IgG)207 (92.0)243 (90.3)0.50