highly significantp < 0.001
Entering both predictors simultaneously increased the explained variance to 62% and left both slopes highly significant (REM_L: β = –0.200, 95% CI = −0.244 to −0.156, p < 0.001; REM_C: β = 0.482, 95% CI = 0.376 to 0.587, p < 0.001), indicating independent contributions.