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Table 2 Correlations among total gingival index, salivary flow rate, and concentrations and secretion rates of transferrin in UWS and SWS in younger and older females

From: Clinical factors affecting salivary transferrin level, a marker of blood contamination in salivary analysis

  Flow rate Concentration of transferrin Secretion rate of transferrin Flow rate Concentration of transferrin Secretion rate of transferrin
In UWS of younger females In SWS of younger females
 Total gingival index −0.246 0.109 −0.122 − 0.341 0.462 0.325
 Flow rate   −0.455 0.119   −0.506* −0.110
 Concentration of transferrin    0.666**    0.879**
In UWS of older females In SWS of older females
 Total gingival index 0.004 0.109 0.283 0.209 0.059 0.041
 Flow rate   −0.352 0.062   −0.644* −0.360
 Concentration of transferrin    0.847**    0.809**
  1. UWS, unstimulated whole saliva; SWS, stimulated whole saliva
  2. Total gingival index reflects the degree of overall gingival inflammation in the oral cavity
  3. Secretion rates of transferrin were calculated by multiplying the flow rates of saliva and their corresponding concentrations of transferrin
  4. The results in the table are from our previous studies [10, 14]
  5. *P < 0.0083, **P < 0.0017 by the Pearson’s correlation analysis with Bonferroni’s correction