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. 2021 May 26;16(5):e0252076. doi: 10.1371/journal.pone.0252076

Fig 3. Correlation between Insomnia Severity Index scores and cortical thickness adjusting by Geriatric Depression Scale.

Fig 3

Correlation between ISI scores and cortical thickness in all participants (n = 119). Only regions with P-value < .001 (uncorrected FWE) are shown. All multivariate linear regression models were adjusted for age, sex, handiness and scan type and Geriatric Depression Scale. Correlation coefficients are expressed as a color scale, indicating an increasing strength of the correlation from red to yellow.