- To help reduce the incidence of low birthweight births.
Definition of indicator and its variants:
- Live and stillborn infants with low birthweights as a percent of all live and stillborn infants with a stated birthweight.
- Age group
- (see glossary)
- Current data
- Trend data
- File-worksheet name
- Percent of births under 1500 and under 2500 gramsP
- 0E&W, E, GOR, ONS area, SHA, LA, PCO, CTY2009
- Numerator data - Number of live and still births occurring in the respective calendar year with birthweights under 1500 grams and under 2500 grams for:
- all maternal ages;·
- maternal ages under 20 years and 20 and over (plus live and still births by 500 gram intervals).
- Source of numerator data – Office for National Statistics (ONS).
- Comments on numerator data - See “Comments on denominator” data.
- Denominator data - All live and still births occurring with a stated birthweight in the respective calendar year for respective maternal ages.
- Source of denominator data - ONS.
- Comments on denominator data - Until October 1992, stillbirths were legally defined as fetal deaths occurring after 28 weeks of gestation. In October 1992 the definition was revised to include fetal deaths occurring after 24 weeks of gestation. The data presented here are based on the revised definition, and hence are not comparable with data for years before 1993.
- Birthweight is obtained from the birth notification information provided to the registrar of births and deaths by the local health services. Birthweight is not always stated in the notifications.
- The figures presented here are expressed as percentages of total births with a stated birthweight, thereby excluding births without a stated birthweight from the denominator. These figures are therefore not comparable with data for years before 1994, which were expressed as percentages of total births. In England and Wales in 2008, birthweight was not stated for 0.8% of total births and in 2009 for 0.7%.
Interpretation of indicators:
- Quality of indicator - Annex 12 describes the criteria that should be used to judge the quality of this indicator. The application of the criteria is dependent on the context (e.g. describing a single organisation, comparing several organisations) and the level (e.g. national / regional with large numbers of events, local with small numbers of events) at which the data are to be used.
1.Office for National Statistics. Statistical Bulletin - Infant and perinatal mortality by health areas in England and Wales, 2009. Available at: http://www.statistics.gov.uk/pdfdir/ipm0910.pdf 2.Office for National Statistics. Statistical Bulletin - Infant and perinatal mortality 2008: health areas, England and Wales. September 2009. Available at: http://www.statistics.gov.uk/pdfdir/ipm0909.pdf 3.Department of Health. National Service Framework for Children, Young People and Maternity Services – Emerging findings. London: Department of Health, 2003.4.Department of Health. National Service Framework for Children, Young People and Maternity Services – Standard for Hospital Services. London: Department of Health, 2003.