Younger (n = 30) | Older (n = 20) | P value | ||
---|---|---|---|---|
Age (years) | 25.9 ± 2.1 | 65.1 ± 9.0 | < 0.001** | |
Tooth number | 28.0 ± 2.0 | 24.9 ± 6.0 | 0.003** | |
Total gingival index | 17.7 ± 16.0 | 23.2 ± 10.6 | < 0.001** | |
Flow rate (mL/min) | UWS | 0.46 ± 0.27 | 0.20 ± 0.16 | 0.078 |
SWS | 1.54 ± 0.48 | 0.83 ± 0.43 | 0.556 | |
Concentration of transferrin (mg/dL) | UWS | 1.16 ± 0.96 | 0.65 ± 0.82 | 0.357 |
SWS | 0.49 ± 0.38 | 0.29 ± 0.30 | 0.227 | |
Secretion rate of transferrin (μg/min) | UWS | 4.18 ± 2.87 | 0.90 ± 0.84 | < 0.001** |
SWS | 6.62 ± 4.44 | 1.62 ± 0.90 | < 0.001** |