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. 2020 Sep 14;3(9):e2017337. doi: 10.1001/jamanetworkopen.2020.17337

Figure 2. Evolution of Clinical Symptoms of Traumatic Brain Injury (TBI) in the Low-Level Light Therapy and Sham Groups.

Figure 2.

Scores on the Rivermead Post-Concussion Symptoms Questionnaire, a 16-item self-assessment questionnaire. Each item in the questionnaire is assessed on a 5-point scale ranging from 0 (no problem) to 4 (severe problem). Bars show the standard error of the mean. A, Scores from RPQ-3 assessment, including early, objective, and physical symptoms of TBI. Time: P < .001, treatment: P = .40, and time × treatment: P = .97. B, Scores from RPQ-13 assessment, including later, more cognitive and behavioral symptoms. Time: P = .91, treatment: P = .67, and time × treatment: P = .89. C, Total RPQ scores. Time: P = .39, treatment: P = .61, and time × treatment: P = .91.