Smoking status of women at initial assessment and at birth by local health board

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Standard shorthand is used in this table: [x] = not available, [z] = not applicable.

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Year ( of 9 selected9 selectable options)

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Area ( of 10 selected10 selectable options)

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Smoking status ( of 6 selected6 selectable options)

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Data valuesData descriptionYearAreaSmoking statusIndicator
2,755Number2024WalesSmokingSmoking status at initial assessment
2,595Number2024WalesSmokingSmoking status at birth
18,337Number2024WalesNot smokingSmoking status at initial assessment
18,747Number2024WalesNot smokingSmoking status at birth
581Number2024WalesSmoking not statedSmoking status at initial assessment
331Number2024WalesSmoking not statedSmoking status at birth
21,673Number2024WalesRecords with valid smoking dataSmoking status at initial assessment
21,673Number2024WalesRecords with valid smoking dataSmoking status at birth
2,890Number2024WalesRecords with invalid smoking dataSmoking status at initial assessment
2,890Number2024WalesRecords with invalid smoking dataSmoking status at birth
24,563Number2024WalesAll recordsSmoking status at initial assessment
24,563Number2024WalesAll recordsSmoking status at birth
925Number2024Betsi Cadwaladr University Local Health BoardSmokingSmoking status at initial assessment
808Number2024Betsi Cadwaladr University Local Health BoardSmokingSmoking status at birth
4,200Number2024Betsi Cadwaladr University Local Health BoardNot smokingSmoking status at initial assessment
4,303Number2024Betsi Cadwaladr University Local Health BoardNot smokingSmoking status at birth
28Number2024Betsi Cadwaladr University Local Health BoardSmoking not statedSmoking status at initial assessment
42Number2024Betsi Cadwaladr University Local Health BoardSmoking not statedSmoking status at birth
5,153Number2024Betsi Cadwaladr University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
5,153Number2024Betsi Cadwaladr University Local Health BoardRecords with valid smoking dataSmoking status at birth
5,153Number2024Betsi Cadwaladr University Local Health BoardAll recordsSmoking status at initial assessment
5,153Number2024Betsi Cadwaladr University Local Health BoardAll recordsSmoking status at birth
16Number2024Powys Teaching Local Health BoardSmokingSmoking status at initial assessment
13Number2024Powys Teaching Local Health BoardSmokingSmoking status at birth
146Number2024Powys Teaching Local Health BoardNot smokingSmoking status at initial assessment
159Number2024Powys Teaching Local Health BoardNot smokingSmoking status at birth
13Number2024Powys Teaching Local Health BoardSmoking not statedSmoking status at initial assessment
3Number2024Powys Teaching Local Health BoardSmoking not statedSmoking status at birth
175Number2024Powys Teaching Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
175Number2024Powys Teaching Local Health BoardRecords with valid smoking dataSmoking status at birth
175Number2024Powys Teaching Local Health BoardAll recordsSmoking status at initial assessment
175Number2024Powys Teaching Local Health BoardAll recordsSmoking status at birth
257Number2024Hywel Dda University Local Health BoardSmokingSmoking status at initial assessment
272Number2024Hywel Dda University Local Health BoardSmokingSmoking status at birth
2,232Number2024Hywel Dda University Local Health BoardNot smokingSmoking status at initial assessment
2,381Number2024Hywel Dda University Local Health BoardNot smokingSmoking status at birth
171Number2024Hywel Dda University Local Health BoardSmoking not statedSmoking status at initial assessment
7Number2024Hywel Dda University Local Health BoardSmoking not statedSmoking status at birth
2,660Number2024Hywel Dda University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
2,660Number2024Hywel Dda University Local Health BoardRecords with valid smoking dataSmoking status at birth
0 [z]Number2024Hywel Dda University Local Health BoardRecords with invalid smoking dataSmoking status at initial assessment
0 [z]Number2024Hywel Dda University Local Health BoardRecords with invalid smoking dataSmoking status at birth
2,660Number2024Hywel Dda University Local Health BoardAll recordsSmoking status at initial assessment
2,660Number2024Hywel Dda University Local Health BoardAll recordsSmoking status at birth
0 [x]Number2024Swansea Bay University Local Health BoardSmokingSmoking status at initial assessment
0 [x]Number2024Swansea Bay University Local Health BoardSmokingSmoking status at birth
0 [x]Number2024Swansea Bay University Local Health BoardNot smokingSmoking status at initial assessment
0 [x]Number2024Swansea Bay University Local Health BoardNot smokingSmoking status at birth
0 [x]Number2024Swansea Bay University Local Health BoardSmoking not statedSmoking status at initial assessment
0 [x]Number2024Swansea Bay University Local Health BoardSmoking not statedSmoking status at birth
0 [x]Number2024Swansea Bay University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
0 [x]Number2024Swansea Bay University Local Health BoardRecords with valid smoking dataSmoking status at birth
2,890 [x]Number2024Swansea Bay University Local Health BoardRecords with invalid smoking dataSmoking status at initial assessment
2,890 [x]Number2024Swansea Bay University Local Health BoardRecords with invalid smoking dataSmoking status at birth
2,890 [x]Number2024Swansea Bay University Local Health BoardAll recordsSmoking status at initial assessment
2,890 [x]Number2024Swansea Bay University Local Health BoardAll recordsSmoking status at birth
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardSmokingSmoking status at initial assessment
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardSmokingSmoking status at birth
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardNot smokingSmoking status at initial assessment
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardNot smokingSmoking status at birth
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardSmoking not statedSmoking status at initial assessment
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardSmoking not statedSmoking status at birth
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardRecords with valid smoking dataSmoking status at birth
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardAll recordsSmoking status at initial assessment
0 [z]Number2024Abertawe Bro Morgannwg University Local Health BoardAll recordsSmoking status at birth
543Number2024Cwm Taf Morgannwg University Local Health BoardSmokingSmoking status at initial assessment
504Number2024Cwm Taf Morgannwg University Local Health BoardSmokingSmoking status at birth
3,269Number2024Cwm Taf Morgannwg University Local Health BoardNot smokingSmoking status at initial assessment
3,353Number2024Cwm Taf Morgannwg University Local Health BoardNot smokingSmoking status at birth
52Number2024Cwm Taf Morgannwg University Local Health BoardSmoking not statedSmoking status at initial assessment
7Number2024Cwm Taf Morgannwg University Local Health BoardSmoking not statedSmoking status at birth
3,864Number2024Cwm Taf Morgannwg University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
3,864Number2024Cwm Taf Morgannwg University Local Health BoardRecords with valid smoking dataSmoking status at birth
3,864Number2024Cwm Taf Morgannwg University Local Health BoardAll recordsSmoking status at initial assessment
3,864Number2024Cwm Taf Morgannwg University Local Health BoardAll recordsSmoking status at birth
0 [z]Number2024Cwm Taf Local Health BoardSmokingSmoking status at initial assessment
0 [z]Number2024Cwm Taf Local Health BoardSmokingSmoking status at birth
0 [z]Number2024Cwm Taf Local Health BoardNot smokingSmoking status at initial assessment
0 [z]Number2024Cwm Taf Local Health BoardNot smokingSmoking status at birth
0 [z]Number2024Cwm Taf Local Health BoardSmoking not statedSmoking status at initial assessment
0 [z]Number2024Cwm Taf Local Health BoardSmoking not statedSmoking status at birth
0 [z]Number2024Cwm Taf Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
0 [z]Number2024Cwm Taf Local Health BoardRecords with valid smoking dataSmoking status at birth
0 [z]Number2024Cwm Taf Local Health BoardAll recordsSmoking status at initial assessment
0 [z]Number2024Cwm Taf Local Health BoardAll recordsSmoking status at birth
596Number2024Aneurin Bevan University Local Health BoardSmokingSmoking status at initial assessment
562Number2024Aneurin Bevan University Local Health BoardSmokingSmoking status at birth
4,193Number2024Aneurin Bevan University Local Health BoardNot smokingSmoking status at initial assessment
4,135Number2024Aneurin Bevan University Local Health BoardNot smokingSmoking status at birth
161Number2024Aneurin Bevan University Local Health BoardSmoking not statedSmoking status at initial assessment
253Number2024Aneurin Bevan University Local Health BoardSmoking not statedSmoking status at birth
4,950Number2024Aneurin Bevan University Local Health BoardRecords with valid smoking dataSmoking status at initial assessment
4,950Number2024Aneurin Bevan University Local Health BoardRecords with valid smoking dataSmoking status at birth
4,950Number2024Aneurin Bevan University Local Health BoardAll recordsSmoking status at initial assessment
4,950Number2024Aneurin Bevan University Local Health BoardAll recordsSmoking status at birth
418Number2024Cardiff and Vale University Local Health BoardSmokingSmoking status at initial assessment
436Number2024Cardiff and Vale University Local Health BoardSmokingSmoking status at birth
4,297Number2024Cardiff and Vale University Local Health BoardNot smokingSmoking status at initial assessment
4,416Number2024Cardiff and Vale University Local Health BoardNot smokingSmoking status at birth
Showing 1 to 100 of 2,004 rows
Page 1 of 21

Next update expected:August 2026

Updates

7th January 2026
Dataset first published.

Main information

Designation
Accredited official statistics
Data provider
Digital Health and Care Wales (DHCW)
Data source
Maternity Indicators Dataset (MIDS)

Overview

Summary of dataset and variables

Number and percentage of women who smoked at initial maternity assessment and at birth broken down by local health board.

This data is derived from the Maternity Indicators dataset, provided to the Welsh Government by Digital Health and Care Wales (DHCW).

The Maternity Indicators dataset combines records from a mother’s initial assessment with a child’s birth record.

Full details of every data item available in the Maternity Indicators dataset are available through the NHS Wales Data Dictionary.

Data collection or calculation

Data from the Maternity Indicators dataset only includes initial assessment data where the initial assessment and birth both occurred in the same health board, in Wales only.

Births to Welsh resident mothers who gave birth in England or in any other country outside of Wales are not included in the data.

Data for each calendar year refers to when the baby was born. Initial assessments may have taken place in the previous year but would be counted in the year in which the birth occurred.

Smoking at initial assessment: While there is a high percentage of valid data for smoking status at initial assessment, reliability depends on self-reporting when CO monitoring is unavailable. CO monitoring was largely suspended during the COVID-19 (2020 to 2023) , so most data in this period is self-reported.

CO monitoring rates:

  • Pre-2020: 20–30%
  • 2021–2022: 1–2%
  • 2024: 28% (near pre-pandemic levels)

E-cigarette use is not detected by CO monitoring and should not be recorded, but some mothers may self-report inaccurately.

Percentages are based on records with valid smoking data; missing data counts are in the quality report.

Smoking at birth: Data faces similar limitations as initial assessment, with increasing missing/invalid records in recent years. At birth, CO monitoring was lower thank at initial assessment:

  • 2016–2020: 1–3%
  • 2024: 9.8%

The number of records with no stated smoking status at birth can be found in Table 4 of the Maternity and birth statistics quality report tables.

Statistical quality

Smoking at initial assessment: Due to data quality issues with the smoking at birth data, smoking at initial assessment for Swansea Bay and Hywel Dda has been excluded from 2021 to 2023 for compatibility purposes.

Smoking at birth: Swansea Bay was not included in the Wales totals from 2021 to 2024 and Hywel Dda was not included in the Wales totals from 2021 to 2023.

In 2024, data for Wales was from the remaining 6 health boards and from 2021 to 2023 was from the 5 remaining health boards. Swansea Bay was excluded from the smoking at birth data due to data quality concerns and Hywel Dda was excluded as they did not provide any data for smoking at birth between 2021 and 2022 and provided incomplete data in 2023. This resulted in excluding smoking at initial assessment for Swansea Bay and Hywel Dda for these time points for compatibility purposes. In 2021 and 2022 Cwm Taf Morgannwg had an unusually high percentage of missing data.

The number of records with missing data has varied throughout the time series and has increased in recent years. The number of missing records can be found in Table 4 of the Maternity and birth statistics quality report tables.

From 1st April 2019 health service provision for residents of Bridgend local authority moved from Abertawe Bro Morgannwg to Cwm Taf. The health board names changed to Cwm Taf Morgannwg University Health Board and Swansea Bay University Health Board. Data for Abertawe Bro Morgannwg and Cwm Taf are available for previous years in this table. More detailed information on the sources of data and analyses in this statistical release are provided in the quality report.

Related reports

Published by

Organisation
Welsh Government
Contact email
stats.healthinfo@gov.wales

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