Table 6.
Sensitivity and specificity of [AGcl] in predicting increased [SIG] for different thresholds
| [AGcl] Increased | [AGcl] Increased | ||
|---|---|---|---|
| [AGcl]>16 mEq/l | SIG Normal | 122 | 25 |
| SIG Increased | 0 | 20 | |
| Sensitivity: 100% | Specificity: 82.9% | ||
| PPV: 44.4% | NPV: 100% | ||
| [AGcl]>17 mEq/l | SIG Normal | 134 | 13 |
| SIG Increased | 0 | 20 | |
| Sensitivity: 100% | Specificity: 91.16% | ||
| PPV: 60.6% | NPV: 100% | ||
| [AGcl]>18 mEq/l | SIG Normal | 143 | 4 |
| SIG Increased | 2 | 18 | |
| Sensitivity: 90% | Specificity: 97.28% | ||
| PPV: 81.82% | NPV: 98.62% |
AGcl: Anion gap corrected for albumin and lactate, SIG: Strong Ion Gap, PPV: Positive Predictive Value, NPV: Negative predictive value.