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  Indian J Med Microbiol
 

Figure 3: The changes of VAS at each evaluative time point in PRF + ozone and ozone groups Note: Results are presented as median with range. *P < 0.05, vs. pre-treatment; #P < 0.05, vs. ozone group (Friedman test). PHN: Postherpetic neuralgia; PRF: pulsed radiofrequency; VAS: visual analog scale.

<b>Figure 3: The changes of VAS at each evaluative time point in PRF + ozone and ozone groups</b> Note: Results are presented as median with range. *<i>P</i> < 0.05, <i>vs</i>. pre-treatment; #<i>P</i> < 0.05, <i>vs</i>. ozone group (Friedman test). PHN: Postherpetic neuralgia; PRF: pulsed radiofrequency; VAS: visual analog scale.