Table 2.
Patients characteristics
| Healthy | CLBP | NeP | |
|---|---|---|---|
| Numbers | 19 | 19 | 19 |
| Age (years) | 40 ± 11 | 47 ± 13 | 58 ± 13* |
| Female (%) | 58 % | 79 % | 68 % |
| BMI (kg/m2) | 23.6 ± 2.9 | 23.9 ± 3.1 | 24.6 ± 3.8 |
| Duration of pain (years) | 0.0 ± 0.0 | 5.9 ± 4.2* | 4.5 ± 2.8* |
| NRS (rest) | 0.0 ± 0.0 | 3.5 ± 2.2* | 5.1 ± 2.2* |
| NRS (motion) | 0.0 ± 0.0 | 4.4 ± 2.1* | 6.9 ± 2.1* |
| KAB | 1.7 ± 0.7 | 3.4 ± 0.9* | 3.3 ± 0.9* |
| CES-D | 2.4 ± 2.2 | 21.8 ± 7.3* | 21.0 ± 9.6* |
Patients with either CLBP or NeP significantly differed from healthy volunteers in terms of duration of pain, NRS, KAB, and CES-D. However, no significant differences were detected between CLBP and NeP patients for any of the parameters. Data are presented as mean ± SD, n = 19, *p < 0.05 versus healthy in paired Student’s t test (NeP) and Mann-Whitney Rank Sum Test (CLBP)
BMI body mass index; NRS (rest/motion) numeric rating scale (0–10) of pain, 0: “no pain,” 10: “worst pain imaginable,” KAB questionnaire for self-perceived stress ranging from 1 (no stress) to 6 (max. stress), CES-D center for epidemiologic studies depression scale, CLBP chronic low back pain, NeP neuropathic pain (symmetrical polyneuropathy, peripheral mononeuropathy, postherpetic neuralgia, orofacial pain)