Paternal health in the first 12-13 years of the ALSPAC study.

The Avon Longitudinal Study of Parents and Children (ALSPAC) collected information from the enrolled pregnancy onwards to identify features of the environment in which the study child was brought up. Among data collected were features concerning the health of the mothers' partners - generally the study father. This was an important feature since the father's physical and mental health can have a long-term effect on the family. In this Data Note we describe the data available on the father's health from pregnancy until 12 years after the offspring was born. Not only is this a valuable addition to the environmental information available for studies of the child's development and the mental health of the mother over time, but it will provide a useful description of the father himself during adulthood.