Demographics
| Variable | Lidocaine diluent group | Saline diluent group | P value |
| (n=60) | (n=60) | ||
| Age (years) | 56.6±14.0 | 56.3±13.4 | 0.926* |
| BMI (kg/m2) | 26.5±4.9 | 29.2±6.1 | 0.007† |
| Baseline NRS | 4.9±2.3 | 5.4±2.4 | 0.257* |
| Gender, freq (%) | |||
| Male | 30 (50.0) | 26 (43.3) | 0.464‡ |
| Female | 30 (50.0) | 34 (56.7) | |
| Radicular pain, freq (%) | |||
| C5 | 15 (25.0) | 13 (21.7) | 0.826§ |
| C6 | 29 (48.3) | 30 (50.0) | |
| C7 | 12 (20.0) | 9 (15.0) | |
| C8 | 0 | 1 (1.7) | |
| Missing | 4 (6.7) | 7 (11.6) | |
| Laterality of symptoms, freq (%) | |||
| Unilateral | 48 (78.3) | 48 (80.0) | 0.634‡ |
| Bilateral | 13 (21.3) | 12 (20.0) | |
| Missing | 1 (1.7) | 1 (1.7) | |
| Physical exam - Weakness in any myotome¶, freq (%) | |||
| Yes | 3 (5.0) | 12 (20.0) | 0.016‡ |
| No | 54 (90.0) | 47 (78.3) | |
| Missing | 3 (5.0) | 1 (1.7) | |
Values are mean (SD), unless specified otherwise.
*From independent t-test.
†From the Wilcoxon rank-sum test/Mann-Whitney two-sample statistic.
‡From Pearson χ2 test.
§From Fisher’s exact test.
¶Without dynamometry
BMI, body mass index; NRS, numerical rating scale.