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Smoking Status at Time of Delivery Collection

BAAS reference: R00412

Frequency: Quarterly                            


Background to the collection

The Smoking Status at Time of Delivery (SATOD) collection covers information on the number of women smoking and not smoking at time of delivery (child birth). You are mandated to submit figures each quarter for the following:

1. Number of maternities

2. Number of women known to be smokers at the time of delivery

3. Number of women known to be non-smokers at the time of delivery 

4. Number of women whose smoking status was not known at the time of delivery  


Launch and submission dates

Quarter

Period

Launched

Submission Deadline

2016-17 Q31 October 2016 - 31 December 20163 January 201725 January 2017
2016-17 Q41 January 2017 - 31 March 20173 April 201728 April 2017
2017-18 Q11 April 2017 - 30 June 2017 3 July 201726 July 2017
2017- 18 Q21 July 2017 - 30 September 2017 2 October 201725 October 2017
2017- 18 Q31 October 2017 - 31 December 2017 2 January 201825 January 2018
2017- 18 Q41 January 2018 - 31 March 2018 3 April 2018 26 April 2018

Please note that revisions will not be accepted as part of this collection. Please therefore ensure that data are entered accurately according to the submission dates. 


Validating your data

For the return each CCG is required to submit four figures at the end of each quarter:

  • Number of maternities
  • Number of women known to be smokers at the time of delivery
  • Number of women known to be non-smokers at the time of delivery
  • Number of women whose smoking status was not known at the time of delivery

All four numbers must be submitted as integers. The following validation will be undertaken by NHS Digital Strategic Data Collection Service (SDCS) on each quarter's submission: 

Number of women known to be smokers at the time of delivery +
Number of women known to be non-smokers at the time of delivery +
Number of women whose smoking status was not known at the time of delivery = Number of maternities

The SDCS will not accept a submission that fails this validation. In this situation the CCG will be prompted to amend and re-submit their data until their submission passes this validation.

A second validation will also be undertaken by the SDCS. The current data return will be validated and if:

  • number of maternities is +/-15% of an average of the previous 4 quarters
  • number of women known to be smokers at the time of delivery is +/-15% of an average of the previous 4 quarters
  • number of women known to be non-smokers at the time of delivery is +/-15% of an average of the previous 4 quarters
  • number of women whose smoking status was not known is above or equal to 5% of number of maternities

If the above validation criteria are not met an error message will appear on submission. The data will either need to be amended, or confirmed as correct by selecting a drop down breach reason or providing further information in the box provided. Please ensure any breach reasons give a full explanation of why the data is not within the tolerance.  If we do not feel the breach reason provides a satisfactory explanation, we may contact you for further details.

Please be aware that NHS Digital are aiming to start publishing the breach reasons.  Therefore only submit reasons you are prepared to put into the public domain and take care not to identify any individuals.

All data will be published with accompanying data quality tables (by CCG) with each data item compared against the average of the previous four quarters' data:

  • percentage change in the number of maternities
  • percentage point change in the percentage of women smoking at time of delivery
  • percentage point change in the percentage of women not smoking at time of delivery
  • percentage point change in the percentage of women with an unknown smoking status

This should maximise the usefulness of the data whilst also encouraging improvements in data quality by highlighting any areas that may have issues. CCGs should aim to keep the percentage of maternities where smoking status is "not known" to below 5 per cent.

Any CCGs who have had more than 10% of maternities with an unknown smoking status in the last three quarters will be escalated to the NHS Digital Data Quality Assurance Steering Group.

You are advised to read the amended guidance to familiarise yourself with the new requirements of the collection.

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