“…Consistent with past research, child sex, family SES, and gestational age at birth affected attention regulation and inhibitory control (Jaekel et al., ; Reveillon et al., ; Williams & Sciberras, ), whereas crying, feeding, and sleeping problems were not affected by child sex, family SES, and gestational age. Previous studies reported mixed results, with some studies showing an association between crying, feeding, and sleeping problems and gestational age (Bilgin & Wolke, ; Schmid et al., ), family SES (Hyde et al., ; Santos et al., ) or sex (Schmid & Wolke, ; Sidor, Fischer, Eickhorst, & Cierpka, ), whereas other studies found no effects for gestational age and birthweight (Hyde et al., ; Santos et al., ), family SES (Schmid et al., ), or sex (Santos et al., ; Schmid et al., ) on crying, feeding, and sleeping problems. These inconsistent results may be explained by differences in sample size, study design, and definition of crying, feeding, and sleeping problems, and in particular, control for potential confounders, across studies.…”