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Time interval for preterm infant weight gain velocity calculation precision
  1. Tanis R Fenton1,2,
  2. Thibault Senterre3,
  3. Ian J Griffin4
  1. 1 Department of Community Health Sciences, Institute of Public Health, Alberta Children’s Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
  2. 2 Nutrition Services, Alberta Health Services, Calgary, Alberta, Canada
  3. 3 Department of Neonatology, CHU de Liege, CHR de la Citadelle, University of Liege, Liege, Belgium
  4. 4 Biomedical Institute of New Jersey and MidAtlantic Neonatal Associates, Morriston, New Jersey, USA
  1. Correspondence to Dr Tanis R Fenton, Nutrition Services, Alberta Health Services, Calgary, Alberta T2N 2T9, Canada; tfenton{at}


Calculation of weight gain velocity is used to guide nutrition and fluid management practices in neonatal intensive care units. Calculations over short time periods may be more responsive to management changes, but less precise. Weight gain velocity calculated over 5 to 7+ days have lower variability and less noise than shorter periods.

  • growth
  • nutrition
  • infant feeding

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  • Contributors TRF led the design of the study, carried out the initial analysis and drafted the initial manuscript. TRF, TS and IJG helped design the study, assisted in the analysis, preparation of the manuscript and approved the final manuscript as submitted.

  • Funding None declared.

  • Competing interests None declared.

  • Ethics approval University of Calgary Conjoint Health Research Ethics Board.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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