Hum. Reprod. Advance Access originally published online on August 19, 2004
Human Reproduction 2004 19(11):2529-2536; doi:10.1093/humrep/deh474
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Hospital care utilization of IVF/ICSI twins followed until 2–7 years of age: a controlled Danish national cohort study
1 The Fertility Clinic, University of Copenhagen, Rigshospitalet, 3 National Board of Health, Health Statistics, Copenhagen, Denmark
2 To whom correspondence should be addressed: The Fertility Clinic, University of Copenhagen, Rigshopitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark. Email: apinborg{at}rh.dk
BACKGROUND: IVF/ICSI twins are likely to have a higher risk of prematurity associated with higher morbidity. The aim of this study was to assess the use of hospital care resources in IVF/ICSI twins on data retrieved until 2–7 years of child age. METHODS: National controlled cohort study on hospital admissions and surgical interventions in 3393 IVF twins, 10 239 spontaneously conceived twins and 5130 IVF singletons born between 1995 and 2000 in Denmark. Cross-linkage of data from the Danish IVF Registry and the National Patient Registry enabled us to identify children who were admitted to hospital or underwent an operation. RESULTS: The frequency of hospitalized children was 69.8, 69.6 and 49.8%, and of children who underwent a surgical intervention 10.6, 11.2 and 8.5% in IVF/ICSI twins, control twins and IVF/ICSI singletons respectively. Odds ratios (OR) (95% confidence intervals) of hospitalization in IVF/ICSI twins versus control twins and IVF/ICSI singletons were 1.04 (0.96, 1.14) and 2.44 (2.22, 2.63) and OR adjusted for year of birth, maternal age and parity were 1.00 (0.91, 1.11) and 2.38 (2.17, 2.63) respectively. Also for term birth infants, IVF/ICSI twins were more likely to be hospitalized than IVF/ICSI singletons: adjusted OR 1.37 (1.22, 1.51). Similar risk of a surgical procedure was observed in IVF/ICSI versus control twins. However, IVF/ICSI twins more often underwent a surgical intervention than IVF/ICSI singletons: adjusted OR 1.26 (1.08, 1.47). This risk disappeared when restricted to term infants: adjusted OR 1.00 (0.81, 1.22). Different sex IVF/ICSI and control twins had equal risk of admissions and surgical interventions, and ICSI children had the same risk as children born after conventional IVF. CONCLUSIONS: Though the use of hospital care resources was similar in IVF/ICSI and control twins, the over-use in IVF/ICSI twins versus IVF/ICSI singletons adds to the arguments for implementing elective single embryo transfer as our standard procedure.
Key words: epidemiology/hospital admission/hospital care resources/ICSI twins/IVF/surgical procedures
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