Due to differences in methodology and time of data extraction, figures may differ slightly from other published work. Figures for Scotland and Health Boards may differ from the sum of lower level geographies. This is due to the presence of some data which could not be assigned to a local area, but are included in the aggregated Scotland figures.
Number and percentage of mothers reporting their smoking status at ante-natal booking visit in the community or at hospital.
Note: This dataset will not be receiving updates through this portal. Please refer to the [Public Health Scotland Open Data](https://www.opendata.nhs.scot/dataset/births-in-scottish-hospitals/resource/e87a7673-0397-43ca-91a5-166184319728) platform for the relevant data. Data on smoking behaviour is based on self-reported information obtained from mothers at their ante-natal booking visit in the community or at hospital. The smoking at booking data item was introduced in 1993/94 and it should be noted that, particularly in the earlier years and again more recently, this information is not always recorded and therefore can affect the results. More information is available on the ISD Scotland website at: [http://www.isdscotland.org/Health-Topics/Maternity-and-Births/](http://www.isdscotland.org/Health-Topics/Maternity-and-Births/)
In February 2019, we updated our methodology for allocating datazones to higher geographies to align with Government Statistical Service Geography Policy. This resulted in revisions to some aggregated figures at Electoral Ward and Scottish Parliament Constituency level.