title: Long-term evaluation of the clinical performance of the TCu200B and the TCu380A in Campinas, Brazil.
abstract: The clinical performance of the TCu200B and TCu380A was evaluated by life table analysis in a cohort of women who wore an IUD from July 1979 to July 1982. This paper presents the results up to five years of use. No significant differences in age and parity were found between the users in the two groups. Overall performance was very good with both models. The cumulative continuation rate was 83.6, 60.9 and 46.1 at one, three and five years with the TCu200 and 84.0, 64.7 and 49.3 with the TCu380A in the same periods. Differences between both IUDs were not significant. The pregnancy rate was lower with the TCu380A and reached statistical significance from the fourth year on. The authors conclude that both IUDs presented very good performance, the TCu380A being more effective, the only significant difference observed.
authors.affiliation: Department of Obstetrics and Gynecology, State University of Campinas, SP Brazil.
authors.forename: J
authors.initials: J
authors.lastname: Díaz
authors.forename: A
authors.initials: A
authors.lastname: Pinto Neto
authors.forename: M
authors.initials: M
authors.lastname: Díaz
authors.forename: N M
authors.initials: NM
authors.lastname: Marchi
authors.forename: L
authors.initials: L
authors.lastname: Bahamondes
mesh_terms: D000328:Adult; D001938:Brazil; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper / Q000009:adverse effects; D015993:Life Tables; D012189:Retrospective Studies