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89, p?=?0.349, ��p2?=?0.009, or birth status, F(1, 103)?=?2.06, p?=?0.154, ��p2?=?0.020, or interaction between infant age and birth status, F(1, 103)?=?0.04, p?=?0.838, ��p2?=?0.000. Therefore, structure and attunement did not differ across age or birth status and were continuous for mothers of preterm and term infants. However, when controlling for previous experience of caregiving, mothers [http://www.selleckchem.com/products/Docetaxel(Taxotere).html Docetaxel cost] of preterm infants were higher on structure than mothers of term infants. Stability was found for structure for mothers of term infants but not mothers of preterm infants (Table 2). Z-tests indicated that the stability of structure was significantly lower for mothers of preterm infants than term infants (z?=??2.50, p?=?0.012, two-tailed test). Stability was also found for attunement for mothers of preterm and term infants ( Table 2). The stability of attunement did not differ between mothers of preterm and term infants (z?=??0.45, p?=?0.653, two-tailed test). We examined potential explanations for the differential stability of structure in mothers of preterm and term infants. Family income was included as a covariate because this variable was related to structure at 5 months. Three dyads were missing data on family income and therefore were excluded from these analyses resulting in a final sample [http://www.selleckchem.com/products/17-AAG(Geldanamycin).html 17-AAG molecular weight] of 102 (40 preterm and 62 term). Table 4 presents the regression coefficients for step 1��structure at birth (centered), birth status, and structure at birth?��?birth status interaction �C and step 2��adding family income �C in predicting structure at 5 months. Step 1 accounted for 34% of the variance in structure scores at 5 months, R2?=?0.34, F(3, 98)?=?16.72, p?[https://en.wikipedia.org/wiki/Tiospirone tiospirone] family income as a covariate attenuated the interaction term to nonsignificance (model 1: ��?=??0.21, p?=?0.037; model 2: ��?=??0.19, p?=?0.065) but only just (a 0.02 absolute reduction in the ��). Family income did not independently predict instability in structure. Therefore, family income accounts for some of the differential stability in structure between mothers of preterm and term infants but only to a limited degree. The first aim of the study was to examine developmental trajectories of maternal complexity of thought and caregiving principles following preterm and term deliveries in the first 5 months of their infant's life. We found prematurity had a differentiated effect on complexity of thought and caregiving principles, with different levels of complexity of thought and caregiving principles affected differently.