Regression Results: Outcomes Regressed on S/L Impairment and Cumulative Risk at Each Age.

Note: R2 refers to variance explained by complete model; Wald = Wald χ2 statistic; OR = odds ratio; S/L impairment = speech/language impairment as assessed at age 5/6 years; pR2 = pseudo-R2 as calculated with Coxe, West, & Aiken’s (2009) formula 9. The pR2 represents how much closer the model is accounting for all the variance as variables are added. (It is not comparable to the R2 derived from ordinary least squares regression, which represents proportion of variance explained.) We derived pseudo-R2 by comparing the complete model to a model where no predictor variables were entered. * p < .05; + p < .01; # p < .005 Regression Results: Outcomes Regressed on S/L Impairment and Cumulative Risk at Each Age.