title: A longitudinal comparison of irritable and nonirritable infants.
abstract: Infantile colic is characterized by persistent crying, diminished soothability, and excessive activity or restlessness. The purpose of this study was to explore the processes underlying the persistent, recurrent irritability by investigating behavioral and interactional differences in irritable and nonirritable infants. In this two-group longitudinal study, 40 infants and their mothers were followed over the first 4 months of life. Statistically significant differences between the two groups were found, with the irritable infants demonstrating an increase in the amount and intensity of crying, more disruption in sleep-wake states, and less synchrony in mother-infant interaction.
authors.affiliation: Medical University of South Carolina, College of Nursing, Charleston, USA.
authors.forename: M R
authors.initials: MR
authors.lastname: Keefe
authors.forename: A M
authors.initials: AM
authors.lastname: Kotzer
authors.forename: A
authors.initials: A
authors.lastname: Froese-Fretz
authors.forename: M
authors.initials: M
authors.lastname: Curtin
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D003085:Colic / Q000503:physiopathology / Q000523:psychology; D003448:Crying; D005260:Female; D006801:Humans; D007223:Infant; D018730:Infant Behavior / Q000502:physiology / Q000523:psychology; D007231:Infant, Newborn; D007410:Intestinal Diseases / Q000503:physiopathology / Q000523:psychology; D007508:Irritable Mood / Q000502:physiology; D008137:Longitudinal Studies; D008297:Male; D009034:Mother-Child Relations; D012894:Sleep Stages