09 October 2023 : Clinical Research
A New Predictive Equation for Estimating Serum Ionized Calcium Levels in Patients on Chronic Hemodialysis
Wei-Li Hung1CE, Chi-Feng Huang23DE, Ming-Hsien Tsai45BC, Hung-Hsiang Liou6AC, Pei-Yang Liu7F, Yu-Wei Fang45AEG*DOI: 10.12659/MSM.941321
Med Sci Monit 2023; 29:e941321
Table 4 Comparison of estimated iCa using various formulae with laboratory-measured iCa.
| Formula | Estimated iCa versus laboratory-measured iCa | ||
|---|---|---|---|
| T value* | P value | ICC | |
| Our equation | −0.418 | 0.676 | 0.905 (0.887–0.920) |
| Laboratory-measured total calcium | −21.234 | <0.001 | 0.770 (0.217–0.904) |
| Payne | −27.401 | <0.001 | 0.767 (0.033–0.917) |
| Clase | −7.821 | <0.001 | 0.897 (0.852–0.926) |
| Jain | 16.557 | <0.001 | 0.858 (0.570–0.933) |
| Ferrari | −16.579 | <0.001 | 0.716 (0.335–0.854) |
| * Paired test to compare the difference between estimated iCa and laboratory-measured iCa. iCa – ionized Ca; ICC – intraclass correlation. | |||