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Use of record linkage between a statewide genetics service and a birth defects/congenital malformations register to determine use of genetic counselling services
Authors:Jane Halliday  Odette Griffin  Agnes Bankier  Catherine Rose  Merilyn Riley
Abstract:The Birth Defects/Congenital Malformations Register of the Victorian Department of Human Services contains detailed, confidential information on over 2,000 babies born with a birth defect each year in Victoria, Australia, representing approximately 3% of the annual number of births. For 1991 and 1993, the type of anomaly was categorised as warranting a high, moderate, or low need of referral for genetic counselling, depending on risk of recurrence and possible genetic cause. The Victorian Clinical Genetics Service at the Murdoch Institute, Melbourne, offers free, centralised genetic counselling services for the entire state. A comparison of case records between the two agencies has shown little difference in overall use of genetic counselling between 1991 (17%) and 1993 (16%). Rate of uptake in the “high need” category improved only slightly during that period, from 40% in 1991 to 43% in 1993. Utilization of genetic counselling services did not vary disproportionately with mother's country of birth, but was higher for older mothers. As was expected, rates were highest when a baby was born at the only hospital that provides on-site genetic counselling services. Even where a statewide genetic counselling service is in place, it is disappointing that over half of those judged at high need for genetic counselling are not making use of this service. This study will provide baseline information to which future studies can be compared. Using the same study methodology, it will be possible to examine whether the uptake rate increases in accordance with increased genetic services. Am. J. Med. Genet. 72:3–10, 1997. © 1997 Wiley-Liss, Inc.
Keywords:birth defects  congenital malformations  genetic counselling
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