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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: Neurobiol Aging. 2020 Dec 29;100:72–82. doi: 10.1016/j.neurobiolaging.2020.12.019

Table 2.

Results of multiple linear regression analyses examining the relationship between overall locus coeruleus contrast and global cortical thickness

Predictor β SE 95% CI t p
A. Full sample, F(3, 292)=39.38, p<.001, R2=0.288, adjusted R2 = 0.281
Overall LC contrast 0.069 0.052 −0.033, 0.172 1.33 .185
Age −0.506 0.050 −0.604, −0.408 −10.2 <.001
Overall LC contrast * Age Group 0.138 0.052 0.035, 0.241 2.64 .009
B. Older adults, F(2, 226)=9.14, p<.001, R2=0.075, adjusted R2=0.067
Overall LC contrast 0.216 0.064 0.090, 0.342 3.37 <.001
Age −0.153 0.064 −0.280, −0.027 −2.39 .018
C. Younger adults, F(2, 64)=1.72, p=.187, R2=0.051, adjusted R2=0.021
Overall LC contrast −0.087 0.123 −0.332, 0.158 −0.71 .482
Age −0.198 0.123 −0.443, 0.047 −1.62 .111

Note. Regression coefficients and standard errors are standardized values. Age group was coded as: older adults = 1, younger adults = −1. CI = confidence interval; LC = locus coeruleus; SE = standard error.