In an adjusted linear regression analysis performed with the variables that remained in the model (p<0.2), a history of affective disorder (p = 0.049), PPAD (p = 0.049), mother anxiety disorder (p = 0.043), NGF levels (p = 0.034) and infant cortisol levels (p = 0.013) were associated with infant motor development (Table 3). This evidence concerns the gene NGF and anxiety disorder.