“…The key predictor of interest was parental report of stuttering and the outcome was performance on the SDQ. The other variables that were included in the analyses were chosen to enable, as far as possible, a comparison with another prospective community-based study, that Reilly et al (2013), and had been shown in other studies to be associated with SDQ outcomes: sex (Searle, Sawyer, Miller-Lewis & Baghurst, 2014), maternal education (Hartas, 2011), economic circumstances (Pastor, Reuben &Duran, 2012), verbal ability (Clegg, Law, Rush, Peters andRoulstone, 2015) and non-verbal ability (Adams, Snowling, Hennessy & Kind, 1999). Further details of the variables are as follows:…”