113
Views
13
CrossRef citations to date
0
Altmetric
Original Research

Pharmacodynamic analysis of the analgesic effect of capsaicin 8% patch (Qutenza™) in diabetic neuropathic pain patients: detection of distinct response groups

, , , , &
Pages 51-59 | Published online: 15 Mar 2012

Figures & data

Figure 1 (A) Mean response of the total population (n = 91). (B) Mean response of patients belonging to group 1 (patients with a deterioration of their pain) as determined from the mixture model analysis. (C) Mean response of patients belonging to group 2 (patients with no response to treatment). (D) Mean response of patients belonging to group 3 (patients with an initial drop in NPRS followed by a slow decline towards baseline NPRS). (E) Mean response of patients belonging to group 4 (patients with a reduction in NRPS which is maintained throughout the study period). Values are mean ± SEM.

Abbreviations: NPRS, numerical pain rating score; SEM, standard error of the mean.
Figure 1 (A) Mean response of the total population (n = 91). (B) Mean response of patients belonging to group 1 (patients with a deterioration of their pain) as determined from the mixture model analysis. (C) Mean response of patients belonging to group 2 (patients with no response to treatment). (D) Mean response of patients belonging to group 3 (patients with an initial drop in NPRS followed by a slow decline towards baseline NPRS). (E) Mean response of patients belonging to group 4 (patients with a reduction in NRPS which is maintained throughout the study period). Values are mean ± SEM.

Table 1 Demographics of patients involved in the analysis

Table 2 Pharmacodynamic parameter estimates

Figure 2 Examples of the data fits of Groups 3 and 4. Best, median and worst fits of NPRS responses belonging to Groups 3 (A, B, and C) and 4 (D, E, and F) are given.

Abbreviation: NPRS, numerical pain rating score.
Figure 2 Examples of the data fits of Groups 3 and 4. Best, median and worst fits of NPRS responses belonging to Groups 3 (A, B, and C) and 4 (D, E, and F) are given.

Figure 3 Goodness-of-fit plots of the final pharmacodynamic model. Observed versus population predicted (A) and individual predicted NPRS pain score (B). The black lines are the lines of identity. In the lower panel the conditional weighted residuals versus population predicted NPRS score (C) and time (D) are plotted.

Abbreviation: NPRS, numerical pain rating score.
Figure 3 Goodness-of-fit plots of the final pharmacodynamic model. Observed versus population predicted (A) and individual predicted NPRS pain score (B). The black lines are the lines of identity. In the lower panel the conditional weighted residuals versus population predicted NPRS score (C) and time (D) are plotted.

Table 3 Percentage reduction in numerical pain rating score from baseline at week 4 and 12