Table 6

 Levels of nitrite and nitrate (μM) in oral EBC and saliva before and after mouthwash with deionised water and chlorhexidine

BaselinedH2OChlorhexidine
*p<0.05, ***p<0.001 compared with after deionised water (Wilcoxon test).
Exhaled breath condensate
    Nitrite2.8 (0.5)3.0 (0.9)2.0 (0.4)*
    Nitrate24.9 (5.1)28.7 (4.9)29.6 (8.6)
Saliva
    Nitrite182 (34)140 (26)79.3 (17)***
    Nitrate415 (82)367 (77)429 (84)