A Novel, Hand-Held, and Low-Level Light Therapy Device for the Treatment of Acne Vulgaris: A Single-Arm, Prospective Clinical Study

Figure 3

Treatment efficacy in the per-protocol population. (a) Changes in inflammatory acne lesion counts with time (). (b) Changes in noninflammatory acne lesion counts with time. “ns” indicates that there is no statistical difference. (c) A 25-year-old male prior to treatments (left) and at 8 weeks following 4 weeks of light‐emitting diodes-laser treatments (right). (d) A 27-year-old female prior to treatments (left) and at 8 weeks following 4 weeks of light‐emitting diodes-laser treatments (right). (e) Number of patients with each grade of acne severity at each time point in the per-protocol population, graded using the Investigator’s Global Severity Assessment. (f) Changes in the patients’ subjective assessments of acne severity with time (measured by visual analogue scale) ().

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