BPG is committed to discovery and dissemination of knowledge
Observational Study
Copyright: ©Author(s) 2026.
World J Methodol. Sep 20, 2026; 16(3): 121596
Published online Sep 20, 2026. doi: 10.5662/wjm.v16.i3.121596
Table 1 Number of subjects and salivary glutathione peroxidase-1 concentration in each periodontal stage, n (%)

Total (n = 143)
Salivary GPx-1 (pg/mL), median (P25-P75)
P value
< 0.001
Periodontal health86 (60.1)1511 (887-2024)
Periodontitis stage I16 (11.2)1154 (358-1333)
Periodontitis stage II23 (16.1)978 (645-1457)
Periodontitis stage III13 (9.1)629 (292-1128)
Periodontitis stage IV5 (3.5)435 (62-768)


Write to the Help Desk