Table 1.
Baseline demographic and pain data.
| Parameter | Genotype | Total(n = 296) | |
|---|---|---|---|
| GG(n = 231) | AG and AA(n = 65) | ||
| Mean age [y] (SD) | 58.2 (15.3) | 57.5 (18.4) | 58.0 (16.0) |
| Female sex (%) | 57 | 58 | 57 |
| Ethnicity (%) | |||
| White | 83.5 | 84.6 | 83.8 |
| Black/African American | 11.3 | 13.8 | 11.8 |
| Other | 5.2 | 1.5 | 4.4 |
| Average pain intensity at baseline [NRS, range 0-10] (SD, n) | 5.5 (1.1, 231) | 5.5 (1.1, 65) | 5.5 (1.1, 296) |
| Duration of PHN [y] (time from diagnosis of herpes zoster, SD, n)* | 2.4 (2.1, 208) | 1.9 (1.3, 56) | 2.3 (1.9, 264) |
NRS, numeric rating scale; PHN, postherpetic neuralgia; SD, standard deviation, genotype refers to single-nucleotide polymorphism rs6746030 of SCN9A (A allele is R1150W polymorphism, G is the common allele).
*The Pearson correlation coefficient between average pain intensity at baseline and duration of PHN is 0.044 with p-value of 0.485.