The Maternity Indicators Data Set captures data relating to the woman at initial assessment and to mother and baby (or babies) for all births. This relates to initial assessment and birth activity undertaken in Wales only.

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The Maternity Indicators Data Set captures data relating to the woman at initial assessment and to mother and baby (or babies) for all births. This relates to initial assessment and birth activity undertaken in Wales only. Each Health Board must make available data in relation to the initial assessments and/or birth events which they managed.

For example, if they only carried out the initial assessment the Health Board would only be required to provide the initial assessment data.  This is further detailed in the technical specification (see ‘return submission details’). 

Where the initial assessment and birth events take place in different Health Boards, data will be linked nationally by the NHS Wales Informatics Service.

Velindre NHS Trust are excluded from this requirement, as they do not provide any maternity services.

Monthly activity data must include only initial assessment and birth activity that took place in the previous month.

This dataset requires additional governance approvals from the data provider before data can be provisioned to a SAIL project.

HDR UK

DHCW

The weight of the woman (in kg, to the nearest 100g), as measured at the Initial Assessment (Booking Visit), or within the 10-12 week gestation period (when not undertaken at Initial Assessment).

SERVICE_USER_WEIGHT_KG

Initial Assessment related data items in the Maternity Indicators Data Set (MI ds):
The scope of the data is as follows:
•The Maternity Indicators Data Set captures data relating to the woman at initial assessment and to mother and baby (or babies) for all births.  This relates to initial assessment and birth activity undertaken in Wales only. Each Health Board must make available data in relation to the initial assessments and/or birth events which they managed.
o  For example, if they only carried out the initial assessment the Health Board would only be required to provide the initial assessment data.  This is further detailed in the technical specification (see ‘return submission details’).
o  Where the initial assessment and birth events take place in different Health Boards, data will be linked nationally by the NHS Wales Informatics Service.
•Velindre NHS Trust are excluded from this requirement, as they do not provide any maternity services.
•Monthly activity data must include only initial assessment and birth activity that took place in the previous month.

INITIAL_ASSESSMENT

The gestation period at initial assessment / booking visit, in completed weeks (rounded down).

GEST_WEEKS

Status code assigned when deriving the Encrypted Anonymised Linking Field of the mother.

MOTHER_ALF_STS_CD

The date of the initial maternity assessment / booking visit where a full Health & Social Care Needs Assessment is undertaken and the antenatal sections of the maternity hand held record are completed.

INITIAL_ASS_DT

Provider Unit Code (5 character code). This is the organisation code of the health care provider. The provider code identifies the health care provider who is responsible for managing the treatment of the patient.

Notes:

1.  Healthcare providers may also act as commissioners when sub-contracting patient care services to other providers of health care.

2.  Although the healthcare provider identified in this data item is responsible for managing the patient’s treatment, it may not necessarily be where the treatment is actually conducted. For example, where the treatment has been sub-contracted to another healthcare provider.

3.  For OPRD (outpatient referral dataset), the Organisation Code (Code of Provider) is that of the organisation receiving the referral. If the provider is a Local Health Board/Trust, use the 3 character Local Health Board/Trust code with 2 zeros placed in the 4th and 5th character position.

4.  For RTTD (Referral to Treatment Times (Combined)), use the 3 character Local Health Board/Trust code.

PROV_CD

Encrypted Local Patient Identifier of the woman. This is the case record number. It is a unique identifier for a patient within a health care provider.

Where care for NHS patients is sub-commissioned in the independent sector or overseas, the NHS commissioner local patient identifier should be used. If no NHS local patient identifier has been assigned the independent sector or overseas provider identifier should be used.

SERVICE_USER_LOCAL_ID_E

Submitting Unit Code (3 character code). This is the organisation code of the submitting organisation. The provider code identifies the health care provider who is responsible for managing the treatment of the patient.

SUBMITTING_ORG_CD

Code indicating whether or not the woman has an existing mental health condition.

SERVICE_USER_HAS_MENTAL_HEALTH_CONDITION_CD

Code indicating the woman's mental health care plan.

SERVICE_USER_HAS_MENTAL_HEALTH_CARE_PLAN_CD

Date when the data made available i.e. date of loading

AVAIL_FROM_DT

MAT_AGE_AT_ASS

The Anonymised Linking Field of the mother, which has been Encrypted for its use within the database, is derived from the persons NHS number by double encryption (first encryption occurs in NWIS and the second in SAIL). If the NHS number is not supplied in the data extract then matching methods are applied.

MOTHER_ALF_E

NHS Number Status Indicator of the woman. The status indicator provides information about the potential accuracy and reliability of the NHS number and hence the use to which the number can be put. The indicator can also be used to indicate the general standard of patient data quality within Trusts. This data item became mandatory in Wales in April 1999.

SERVICE_USER_NHS_STS_IND

Resident Health Unit Code (3 character code) of the woman. Code for the Local Health Board (LHB) where the patient is a resident, identified via the NHS Postcode Directory.

Note: For English Residents treated in Wales, use the Organisation Code of the Primary Care Trust (PCT) of Residence for all activity / waiting times data up to 31st March 2013. From 1st April 2013 (inclusive) onwards, use the Organisation Code of the Clinical Commissioning Group (CCG).

SERVICE_USER_RESIDENT_HEALTH_ORG_CD

The number of previous caesarean sections performed on the woman.

A caesarean section is an operation to deliver a baby. It involves making a cut in the front wall of a woman’s abdomen and womb. The operation can be a planned (elective) procedure – when a medical need for the operation becomes apparent during pregnancy or if it’s requested by the mother in advance.

SERVICE_USER_PREV_CAESAREANS

Code indicating the smoking status of the woman at the time of the Initial Assessment / Booking Visit.

Wherever possible, this should be validated via Carbon Monoxide testing (i.e. CO-validated).  Where not CO-validated, this should be the self-reported smoking status of the mother.

SERVICE_USER_SMOKER_STS_CD

Code indicating the parity group of the mother. Parity is the number of times a woman has given birth to a live neonate (any gestation) or at 24 weeks or more, regardless of whether the child was viable or non-viable (i.e. stillbirths).

SERVICE_USER_PARITY_CD

Lower Layer Super Output Area (LSOA) code (9 characters) in which the patient is resident, based on the current census.

STATS_CURR_CENSUS_LOWER_SUPER_OUTPUT_AREA_CD

Gravida indicates the number of times the woman has been pregnant, regardless of whether these pregnancies were carried to term. A current pregnancy, if any, is included in this count.

SERVICE_USER_GRAVIDA_CD

Site Code of Treatment/ Initial Assessment (5 character code). The organisation code for the site where the patient will be or is treated.

TREAT_SITE_CD

The height of the woman (in cm)as measured at the Initial Assessment (Booking Visit), or within the 10-12 week gestation period (when not undertaken at Initial Assessment).

SERVICE_USER_HEIGHT

Lower Layer Super Output Area (LSOA) name in which the patient is resident, based on the current census.

STATS_CURR_CENSUS_LOWER_SUPER_OUTPUT_AREA_NAME

Date of birth of baby.

Note that Date Status is not associated with this date; the provider must record this date and should always be able to supply it.

BABY_BIRTH_DT

Labour/ Birth related data items in the Maternity Indicators Data Set (MI ds):
The scope of the data is as follows:
•The Maternity Indicators Data Set captures data relating to the woman at initial assessment and to mother and baby (or babies) for all births.  This relates to initial assessment and birth activity undertaken in Wales only. Each Health Board must make available data in relation to the initial assessments and/or birth events which they managed.
o  For example, if they only carried out the initial assessment the Health Board would only be required to provide the initial assessment data.  This is further detailed in the technical specification (see ‘return submission details’).
o  Where the initial assessment and birth events take place in different Health Boards, data will be linked nationally by the NHS Wales Informatics Service.
•Velindre NHS Trust are excluded from this requirement, as they do not provide any maternity services.
•Monthly activity data must include only initial assessment and birth activity that took place in the previous month.

BIRTH

Encrypted Local Patient Identifier of the Mother. This is the case record number. It is a unique identifier for a patient within a health care provider.

Where care for NHS patients is sub-commissioned in the independent sector or overseas, the NHS commissioner local patient identifier should be used. If no NHS local patient identifier has been assigned the independent sector or overseas provider identifier should be used.

MAT_SERVICE_USER_LOCAL_ID_E

Resident Health Unit Code (3 character code) of the mother. Code for the Local Health Board (LHB) where the patient is a resident, identified via the NHS Postcode Directory. This ensures that the Local Health Board can receive information about the care given to its residents.

Note: For English Residents treated in Wales, use the Organisation Code of the Primary Care Trust (PCT) of Residence for all activity / waiting times data up to 31st March 2013. From 1st April 2013 (inclusive) onwards, use the Organisation Code of the Clinical Commissioning Group (CCG).

MAT_SERVICE_USER_RESIDENT_HEALTH_ORG_CD

PROV_ORG_CD

NHS Number Status Indicator of the child. The status indicator provides information about the potential accuracy and reliability of the NHS number and hence the use to which the number can be put. The indicator can also be used to indicate the general standard of patient data quality within Trusts. This data item became mandatory in Wales in April 1999.

The gestation period at onset of labour, in completed weeks (rounded down).

Gestation is the carrying of an embryo or foetus inside a woman. The time interval of a gestation is known as the gestation period.  This should be estimated based on the findings of ultrasound scan at the initial assessment / booking visit, which is regarded as the most reliable means of calculating the gestation period. 

When an ultrasound scan is not undertaken, the gestation period should be measured from the first day of the last menstrual period (LMP), where this is thought to be reliable.  Where the LMP is unknown and an ultrasound scan is not undertaken, this should be a best estimate based on likely LMP.

Please use the example below to calculate and report the gestation period at onset of labour in completed weeks:
- 9 + 6 = 9 completed weeks.
- 10 + 0 = 10 completed weeks
- 10 + 1 = 10 completed weeks etc

LABOUR_ONSET_GEST_WEEKS

This is the total Apgar score for a baby at 5 minutes after birth. The apgar score is a measure of the physical condition of a newborn baby. It is obtained by adding points (2, 1, or 0) for heart rate, respiratory effort, muscle tone, response to stimulation and skin coloration; a score of ten represents the best possible condition.

BIRTH_APGAR_SCORE

An indicator of whether the birth was a live or a stillbirth (a birth on or after a gestation of 24 weeks (168 days) where the baby shows no identifiable signs of life at delivery).

BIRTH_OUTCOME_CD

Code indicating the method by which the process of labour began or delivery by a caesarean section occurred. Only those methods that are used to induce labour, such as surgical induction, medical induction or a combination of the two, should be recorded. Methods that are used to accelerate labour should not be recorded.

LABOUR_ONSET_MODE_CD

LABOUR_ONSET_FOETUS_NUM

Code indiacting if the woman experienced a 3rd or 4th degree tear during childbirth.

LABOUR_PERINEAL_STS_CD

MAT_AGE

The mode of birth of a baby. Note that this may be different for different foetuses in the same delivery.

BIRTH_MODE_CD

The order of the birth where more than one birth resulted from pregnancy.

BIRTH_ORDER

Encrypted Local Patient Identifier of the child. This is the case record number. It is a unique identifier for a patient within a health care provider.

Where care for NHS patients is sub-commissioned in the independent sector or overseas, the NHS commissioner local patient identifier should be used. If no NHS local patient identifier has been assigned the independent sector or overseas provider identifier should be used.

The Anonymised Linking Field of the child, which has been Encrypted for its use within the database, is derived from the persons NHS number by double encryption (first encryption occurs in NWIS and the second in SAIL). If the NHS number is not supplied in the data extract then matching methods are applied.

CHILD_ALF_E

BIRTH_TREAT_CD

Code to indicate whether medical or surgical augmentation of labour was undertaken in order to accelerate labour.

The augmentation of labour is an intervention that is intended to increase the intensity of labour, usually when the caregiver feels the labour is not 'progressing', or is progressing too slowly.

Augmentation of labour differs from induction, in that the labour has already started in some way, but is not progressing, has slowed or stopped. This can also include interventions to stimulate contractions after the waters have broken on their own (although some caregivers will refer to this as an induction).

Augmenting the labour involves artificial stimulation of the contractions. This may be needed if the contractions have become weak, not coordinated (or irregular), far apart, not lasting long enough or have ceased for a period. If the labour needs augmenting, it means the contractions are not efficient enough to dilate the cervix.

LABOUR_AUGMENTATION_CD

The weight of the woman (in kg, to the nearest 100g), as measured at 36-38 weeks, or at onset of labour. The aim is that the information relates to a point as late in the pregnancy as is practically possible.

MAT_SERVICE_USER_WEIGHT_KG

The weight of the baby at birth, recorded in grams.

SERVICE_USER_WEIGHT_GRAMS

Site Code of Treatment/ Birth (5 character code). The organisation code for the site where the patient will be or is treated.

BIRTH_TREAT_SITE_CD

Code indicating the lie of the foetus at onset of labour.

A foetal lie of ‘Transverse’ is compatible with a foetal presentation of ’08 – Other’ or ’09 –Not Known’ only.  It must not be used if the presentation is cephalic or breech.

Conversely, a foetal lie of ‘Oblique’ or ‘Longitudinal’ may only be used where the foetal presentation is ’01 – Cephalic’, ’02 – Breech’ or ’08 – Other’.

LABOUR_ONSET_FOETAL_LIE_CD

Code indicating if epidural was administered for pain relief.

An Epidural is an injection of a local anaesthetic into the space outside the dura mater of the spinal cord in the lower back region to produce a loss of sensation especially in the abdomen or pelvic region.

LABOUR_EPIDURAL_STS_CD

Code indicating the smoking status of the woman at 36-38 weeks, or onset of labour. The aim is that the information relates to a point as late in the pregnancy as is practically possible.

Wherever possible, this should be validated via Carbon Monoxide testing (i.e. CO-validated).  Where not CO-validated, this should be the self-reported smoking status of the mother. The aim is that the information relates to a point as late in the pregnancy as is practically possible.

MAT_SERVICE_USER_SMOKER_STS_CD

Code indicating if the woman had an episiotomy during childbirth.

Episiotomy is a surgical cut made at the opening of the vagina during childbirth, to aid a difficult delivery and prevent rupture of tissues.

LABOUR_EPISIOTOMY_CD

Code indicating The presentation of the foetus at onset of labour. The reported presentation may be different for each baby born in a multiple birth.

LABOUR_ONSET_FOETAL_PRESENTATION_CD

Code indicating if the Mother intends to breastfeed the baby at birth.

MAT_INTENDS_BREAST_FEEDING_CD

The estimated post-partum blood loss (measured in millilitres – ml)

LABOUR_ESTIMATED_BLOOD_LOSS_ML

This is the sex of a baby who is born or who is registered with the Local Health Board.

SERVICE_USER_SEX_CD

NHS Number Status Indicator of the mother. The status indicator provides information about the potential accuracy and reliability of the NHS number and hence the use to which the number can be put. The indicator can also be used to indicate the general standard of patient data quality within Trusts. This data item became mandatory in Wales in April 1999.

MAT_SERVICE_USER_NHS_STS_IND

Status code assigned when deriving the Encrypted Anonymised Linking Field of the child.

Maternity Indicators Dataset (MIDS)

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