Infant feeding practices were studied in a longitudinal manner for the period of infancy. The duration of breast feeding was the longest in low income groups and that for artificial feeding longest in high income groups. The age at which solids were introduced in the infants' diet appeared to be governed by socio-economic status. The dilution of artificial feeds and bottle hygiene were generally improper. No strict time schedule was followed for feeding the infant.
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Nagra et al. (1987) studied this question.