Table 5.
Frequency and percentage of control subjects and periodontitis patients whose glomerular filtration rate variables are below, within and above their reference intervals.
| Variable | Classes | Control | Test | RI | ||
|---|---|---|---|---|---|---|
| Fr | % | Fr | % | |||
| Creatinine Clearance (mL/min/1.73m2) | within RI | 23 | 76.7 | 20 | 66.7 | 35 – 44 years: 74 – 138 [25] |
| < RI | 5 | 16.7 | 9 | 30.0 | 45 – 54 years: 74 – 129 | |
| > RI | 2 | 6.7 | 1 | 3.3 | 55 – 64 years: 69 – 122 | |
| MDRD2 (mL/min/1.73m2) | within RI | 20 | 66.7 | 20 | 66.7 | 35 – 44 years: 74 – 138 [25] |
| < RI | 10 | 33.3 | 10 | 33.3 | 45 – 54 years: 74 – 129 | |
| 55 – 64 years: 69 – 122 | ||||||
| Albumin / Urinary Creatinine (mg/g) | within RI | 30 | 100.0 | 30 | 100.0 | ≤ 30 [28,29] |
RI: reference interval; Fr: frequency, i.e. number of subjects in each class with respect to RI. MDRD2: the abbreviated Modification of Diet in Renal Disease formula for predictive estimation of glomerular filtration rate. Statistical analysis: c2 test (P<.05). Superscripts in square brackets indicate sources.