Collected Dataset / ALSPAC_Children_15months

The population consists of any resulting child from all pregnant women residents in the old administrative county of Avon if their estimated delivery date fell between 1 April 1991 and 31 December 1992.

Information was collected through the use of questionnaires, and registries.

Some questions were child based and some were child completed. Questionnaire collected information about accidents or problems the baby may have had, eating and drinking, temperament and the way he may be beginning to understand the world about him. In addition, information was collected about physical health, mental and cognitive issues, diet and nutrition, environmental characteristics, and childcare and schooling. Information about accidents and injuries, medications, hearing, vision problems, other health problems, toilet training, and teeth/dental problems, diet and nutrition information including breastfeeding or bottle feeding, food frequency, feeding difficulties, eating behaviours, and dietary supplements was collected. Environmental exposures such as passive smoke, and contact with pets, childcare and schooling information such as who, where and when children are cared for was also collected.

Amongst mental and cognitive issues, information about development, language/vocabulary, communication and social development was collected.

Children have been linked to the Clinical Practice Research Datalink (CPRD) database, Pupil Level Annual School Census (PLASC), Annual School Census (ASC) and National and the Pupil Database (NPD).

Participants were linked to residential addresses across the life course. Linkages could be established to co-ordinates or health, political and administrative geographies. Participants could also be linked to neighbourhood data.