Relationship between inflammatory factors, lactic acid levels, acute skin failure, bad mood, and sleep quality

Figure 4 Correlation of interleukin-6, C-reactive protein, tumor necrosis factor-α, and lactic acid levels with Pittsburgh sleep quality index score. A: Interleukin-6 levels are positively correlated with the Pittsburgh sleep quality index (PSQI) score; B: C-reactive protein levels are positively correlated with the PSQI score; C: Tumor necrosis factor-α levels are positively correlated with the PSQI score; D: Lactic acid levels are positively correlated with the PSQI score. PSQI: Pittsburgh sleep quality index; IL-6: Interleukin-6; CRP: C-reactive protein; TNF-α: Tumor necrosis factor-α.