marginally significantp = 0.068
When the SSPI was entered in Block 1 and SSPC was entered in Block 2 of a hierarchical logistic regression analysis, there was significant effect in Block 1 ( χ 2 (1) = 7.97, p = 0.005), explaining 8.2% of the variance (Nagelkerke), but only a marginally significant effect for Block 2 ( χ 2 (1) = 3.32, p = 0.068) explaining 11.5% of the variance (Nagelkerke).