Table 3. Electrodiagnostic criteria.
| Disease type | Number of abnormal nerves | Observation | |
|---|---|---|---|
| MNC | SNC | ||
| CIDP | ≥ 2 | ≥ 2 | |
| Possible CIDP * | 1 | 1 | Should fulfill clinical criteria, respond to treatment, and have an additional supportive criterion |
| Distal CIDP | ≥ 2 ULiN | ≥ 2 | |
| Possible distal CIDP | 1 ULiN or 2 LLiN | ≥ 2 | |
| Multifocal CIDP | ≥ 2 * | ≥ 2 * | |
| Possible Multifocal CIDP | 1 | 1 | ≥ 2 limbs affected |
| Possible Focal CIDP | 1 | 1 | |
| Motor CIDP | ≥ 2 | Normal* | *SNC should be normal in at least 4 nerves (median, ulnar, radial, sural) |
| Possible motor CIDP | 1 | Normal* | *SNC should be normal in at least 4 nerves (median, ulnar, radial, sural) |
| Motor-predominant CIDP | ≥ 2 | ≥ 2 | Clinically-motor CIDP with abnormalities in SNC |
| Sensory CIDP | Normal* | ≥ 2 | *MNC should be normal in at least 4 nerves (median, ulnar, tibial, peroneal) |
| Possible sensory-predominant CIDP | 1 | ≥ 2 | Clinically-sensory CIDP with abnormalities in SNC |
| Sensory-predominant CIDP | ≥ 2 | ≥ 2 | Clinically-sensory CIDP with abnormalities in SNC |
Abbreviations: CIDP, chronic inflammatory demyelinating polyradiculoneuropathy; LLiN, lower-limb nerves; MNC, motor nerve conduction; SNC, sensory nerve conduction; ULiN, upper-limb nerves.
Note: Adapted from Van den Bergh, 2021. 2