Low infant birth weight
Low infant birth weight is associated with infant mortality and health problems in later life. Infants who have a low birth weight are also likely to spend longer in hospital.
An infant is considered to be of low birth weight if their weight at birth is less than 2,500 grams/5.5 pounds, irrespective of the gestational age of the infant.
The proportion of low birth weight infants is the number of low birth weight births divided by the total number of live births.
National population data mask differences in outcomes across different population groups. Comparisons of different population groups within countries suggest that the proportion of low birth weight infants might also be influenced by differences in education, income and associated living conditions.
Gaps in data series exist because data was not available for these years.