title: Operational aspects of terminating randomization in the Multicenter Trial of Cryotherapy for Retinopathy of Prematurity. Cryotherapy for Retinopathy of Prematurity Cooperative Group.
abstract: The Multicenter Trial of Cryotherapy for Retinopathy of Prematurity (CRYO-ROP) is a randomized clinical trial sponsored by the National Eye Institute (NEI) designed to test whether cryotherapy applied to eyes of premature infants with a specified extent of stage 3+ ROP significantly decreases the incidence of an unfavorable outcome. An unfavorable outcome is defined as either retinal detachment or a retinal fold and was determined at 3 months posttreatment by the use of a masked photographic system. Enrollment into the trial was terminated on recommendation of the Data and Safety Monitoring Committee 9 months before the scheduled closing date for enrollment because of demonstrated treatment benefit. The purpose of this article is to discuss the operations involved in the orderly termination of enrollment and dissemination of results from this trial. These activities included preparation of trial participants and staff, release of trial information, continuing patient care, data collection and coding, and publication of trial results.
authors.affiliation: Department of Ophthalmology, Oregon Health Sciences University, Portland 97201.
authors.forename: E A
authors.initials: EA
authors.lastname: Palmer
authors.forename: R J
authors.initials: RJ
authors.lastname: Hardy
authors.forename: B R
authors.initials: BR
authors.lastname: Davis
authors.forename: J A
authors.initials: JA
authors.lastname: Stein
authors.forename: R L
authors.initials: RL
authors.lastname: Mowery
authors.forename: B
authors.initials: B
authors.lastname: Tung
authors.forename: D L
authors.initials: DL
authors.lastname: Phelps
authors.forename: D B
authors.initials: DB
authors.lastname: Schaffer
authors.forename: J T
authors.initials: JT
authors.lastname: Flynn
authors.forename: C L
authors.initials: CL
authors.lastname: Phillips
mesh_terms: D001766:Blindness / Q000517:prevention & control; D003452:Cryosurgery; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D007255:Information Services / Q000458:organization & administration; D008402:Mass Media; D011643:Publishing; D012017:Referral and Consultation; D012178:Retinopathy of Prematurity / Q000628:therapy*; D014481:United States