The purpose of this investigation was to identify variables that might affect the failure rate and test duration of Crib-O-Gram hearing screenings. One hundred sixty-three infants who graduated from a neonatal intensive care unit were screened. All screenings were performed by nurses in the open nursery. For the purposes of statistical analyses the infants were divided into three groups: group A--passed the first screening; group B--failed the first screening and passed the second screening; and group C--failed both screenings. The length of Crib-O-Gram screening and screening outcome were not associated with gestational age, conceptional age, weight, or time at which the test commenced. Infants who failed the screening twice had shorter screening durations than infants who passed the screening the first time.