“…As noted, low income is a predictor of PND (Patel et al, 2002; Hamdan et al, 2008; Parsons et al, 2012). It has also been suggested that level of education (Singh-Manoux et al, 2002; Araya et al, 2003; Artazcoz et al, 2004; Robertson et al, 2005; Grussu and Quantraro, 2009), employment status (Ghubash and Eapen, 2009; Hamdan and Tamim, 2011), and mothers' age (Cooper et al, 1999; Rubertsson et al, 2003) are associated with PND, although some research contradicts these findings (Leigh and Milgrom, 2008). …”