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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 4 Number of subjects and salivary glutathione peroxidase-1 concentration in each periodontal stage, n (%) in the subjects matched for age and sex

Total (n = 60)
Salivary GPx-1 (pg/mL), median (P25-75)
P value
0.01
Periodontal health30 (50.0)1471 (856-2009)
Periodontitis stage I12 (20.0)1188 (359-1490)
Periodontitis stage II12 (20.0)1096 (372-1463)
Periodontitis stage III5 (8.3)304 (164-1128)
Periodontitis stage IV1 (1.7)44 (-)


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