Table 5.
Multiple regression analysis of change in blood potassium level following spironolactone administration
| Variable | Estimate (β) | Standard error | t value | p value | Standardized β | VIF | Power |
|---|---|---|---|---|---|---|---|
| Intercept | 2.078 | 0.514 | 4.040 | 0.000 | 0.000 | | |
| Baseline eGFR | −0.003 | 0.002 | −1.350 | 0.182 | −0.177 | 1.063 | |
| Baseline K | −0.401 | 0.109 | −3.670 | 0.001* | −0.488 | 1.105 | 0.949 |
| (baseline eGFR – 66.430) × (baseline K – 4.192) | 0.003 | 0.007 | 0.380 | 0.708 | 0.050 | 1.101 | |
VIF, variance inflation factor; eGFR, estimated glomerular filtration rate; K, serum potassium level.
*p < 0.05.