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Comparative Study
. 2012 May;160(5):774-780.e11.
doi: 10.1016/j.jpeds.2011.11.005. Epub 2011 Dec 16.

Major chromosomal anomalies among very low birth weight infants in the Vermont Oxford Network

Nansi S Boghossian  1 , Jeffrey D Horbar, Joseph H Carpenter, Jeffrey C Murray, Edward F Bell; Vermont Oxford Network
Affiliations
Comparative Study

Major chromosomal anomalies among very low birth weight infants in the Vermont Oxford Network

Nansi S Boghossian et al. J Pediatr. 2012 May.

Abstract

Objective: To examine prevalence, characteristics, interventions, and mortality of very low birth weight (VLBW) infants with trisomy 21 (T21), trisomy 18 (T18), trisomy 13 (T13), or triploidy.

Study design: Infants with birth weight 401-1500 g admitted to centers of the Vermont Oxford Network during 1994-2009 were studied. A majority of the analyses are presented as descriptive data. Median survival times and their 95% CIs were estimated using the Kaplan-Meier approach.

Results: Of 539 509 VLBW infants, 1681 (0.31%) were diagnosed with T21, 1416 (0.26%) with T18, 435 (0.08%) with T13, and 116 (0.02%) with triploidy. Infants with T18 were the most likely to be growth restricted (79.7%). Major surgery was reported for 30.4% of infants with T21, 9.2% with T18, 6.4% with T13, and 4.8% with triploidy. Hospital mortality occurred among 33.1% of infants with T21, 89.0% with T18, 92.4% with T13, and 90.5% with triploidy. Median survival time was 4 days (95% CI, 3-4) among infants with T18 and 3 days (95% CI, 2-4) among both infants with T13 and infants with triploidy.

Conclusion: In this cohort of VLBW infants, survival among infants with T18, T13, or triploidy was very poor. This information can be used to counsel families.

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Conflict of interest statement

CONFLICT OF INTEREST: Dr. Horbar is the Chief Executive and Scientific Officer of the Vermont Oxford Network. Mr. Carpenter is the Director of Operations and Statistics at the Vermont Oxford Network. Both receive salary from the Vermont Oxford Network. None of the authors has any disclosure to report.

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