From: Diagnostic properties of nerve conduction tests in population-based carpal tunnel syndrome
Nerve conduction test, mean (95% confidence interval) | Clinically certain CTS (n = 86) | Symptomatic Controls (n = 155) | Asymptomatic Controls (n = 124)* |
---|---|---|---|
Median nerve distal motor latency (ms) | 4.2 (4.0–4.4)† | 3.6 (3.5–3.7) | 3.4 (3.3–3.5) |
Median nerve digit 3-wrist sensory latency (ms)‡ | 3.6 (3.4–3.8)† | 3.0 (2.9–3.1) | 2.9 (2.8–3.0) |
Median nerve wrist-palm sensory conduction velocity (m/s)‡ | 39.2 (36.5–41.9)† | 48.3 (46.8–49.8) | 50.7 (49.4–52.0) |
Ulnar nerve distal motor latency (ms) | 2.7 (2.6–2.7) | 2.7 (2.6–2.7) | 2.8 (2.7–2.8) |
Ulnar nerve digit 5-wrist sensory latency (ms) | 2.3 (2.2–2.3) | 2.3 (2.3–2.4) | 2.3 (2.3–2.4) |
Median-ulnar nerve sensory latency difference (ms) | 1.3 (1.1–1.5)† | 0.72 (0.65–0.79) | 0.57 (0.52–0.62) |