Table 2 Clinical characteristics of patients with abnormal spinal accessory nerve motor conduction study versus those with normal spinal accessory nerve motor conduction study
From: Spinal accessory neuropathy in patients with chronic trapezius myofascial pain syndrome
Clinical characteristics | Patients with abnormal SAN motor conduction study (n = 7 patients) | Patients with normal SAN motor conduction study (n = 18 patients) | Test of significance | P |
|---|---|---|---|---|
Duration of complaint (months) | ||||
 Median | 18 | 9.5 | Z = – 1.683 | 0.097 |
 Mean ± SD | 20.28 ± 13.13 | 12.55 ± 7.44 |  |  |
 Min.–Max. | 10–48 | 3–24 |  |  |
Pain severity assessment by NRS | ||||
 Median | 8 | 6.5 | Z = – 1.803 | 0.085 |
 Mean ± SD | 8.14 ± 2.03 | 6.61 ± 1.50 |  |  |
 Min.–Max. | 5–10 | 5–10 |  |  |
Number of MTrPs | ||||
 Median | 2 | 2 | Z = − 0.844 | 0.458 |
 Mean ± SD | 4.00 ± 2.82 | 3.11 ± 2.51 |  |  |
 Min.–Max. | 1–6 | 1–6 |  |  |