approached significancep = 0.051
Although the interaction term approached significance ( b nFit x PSQI = −0.05, SE ( b nFit x PSQI ) = 0.026, t (27) = −2.05, p = 0.051), the adjusted R 2 marginally improved from 67% to 70% ( F (3,26) = 23.74, p < 0.0001; n = 30) and the nFit and PSQI estimates and results were nearly identical to those in the second regression ( b nFit = 0.021, SE ( b nFit ) = 0.003, t (26) = 6.90, p < 0.0001; b PSQI = 0.102, SE ( b PSQI ) = 0.029, t (26) = 3.57, p = 0.001).