Stress and Feeding (SAFE): A Pilot Intervention for Mothers and Their Preterm Infants

Descriptive statistics will be computed for demographic and outcome variables. The number of mother/infant dyads recruited but not enrolled will be tracked. If provided, reasons for non-participation will be noted. Enrolled dyads will be tracked and monitored for the number of times the interventions are used and completeness of study data. Acceptability and burden will be assessed by theme analysis of the responses to the interview by the mPI's using traditional strategies of reading and re-reading the transcripts, coding participant responses using their language, and developing categories and subcategories to create a structure for considering acceptability will be completed.. Finally, perceptions of usefulness and satisfaction of the mothers will be assessed by looking at frequencies of Likert responses.

Means and standard errors of the maternal stress and feeding behavior variables will be estimated and graphed across the data collection time points. Although the sample size is small, it is anticipated the mixed effects linear model will be used to assess and quantify changes across time. This model will include a random effect for participant and a fixed effect for time. The model is flexible enough to model potential cofactors, such as age at birth. The study will track the number of successfully obtained, transported, processed and stored samples and compare those number to the proposed maternal and infant cortisol collections.