Amniotic fluid alpha fetoprotein (AFAFP)

Data Definition: If applicable, indicates third doctor's name recorded on requisition form.

Data Definition: SERUM only: Specimen number of the second sample or second trimester sample assigned by the individual screening lab. PS MSH lab: specimen number assigned to second trimester samples; Other PS labs (except for PS NYGH lab): specimen number of the second sample received by the laboratory (eg IPS2)

Data Definition: Unique ID of Scan Centre where prenatal screening dating ultrasound was completed.

Data Definition: Indicates if the screened pregnancy was conceived through in vitro fertilization (IVF).

Data Definition: Gestational age (GA) in days determined by ultrasound (US).

Data Definition: Gestational age in days determined using dates of last normal menstrual period.

Data Definition: Gestational age in days determined by Ultrasound (US) at date second Multiple Marker Serum Screen sample is obtained.

Data Definition: Gestational age in days determined by calculation of last normal menstrual period dates at date first Multiple Marker Serum Screen sample is obtained.

Data Definition: Number of fetuses in the current pregnancy. For Prenatal Screening Follow Up encounters, this field refers to the number of fetuses that the prenatal screening result was based on.

Data Definition: Pregnant person's Ontario Health Insurance Plan (OHIP) number without version code. Other number type when OHIP is not available (for example, RAMQ).

Data Definition: Pregnant person's family name as it appears on official health card. If not available, full legal name.

Data Definition: Pregnant person's date of birth in the format of day, month, year.

Data Definition: Postal code of pregnant person's usual or permanent address closest to the time of conception.

Data Definition: City or municipality of the pregnant person's mailing or permanent address closest to the time of conception

Data Definition: Indicates if the pregnant person had insulin dependant diabetes prior to pregnancy.

Data Definition: Date (day, month, year) of the first day of the person's last known menstrual period. (Cunningham, 2005)

Data Definition: Unique identification number assigned to a test for Multiple Marker Serum Screen and fluid test record.

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Data Definition: Prenatal Screening Ontario-assigned unique identification code for the sonographer performing Nuchal Translucency Measurement.

Data Definition: Date (day, month, year) of first sample collection in standard date format.

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Data Definition: Reported measurement level of alpha-fetoprotein (AFP) assay result based on serum screen and fluid test.

Data Definition: Date (calendar day, month, year) PS result report is issued using standard date format.

Data Definition: Date (calendar day, month, year) of ultrasonography used for interpretation.

Data Definition: Indicates if the pregnant person smoked at time of conception.

Data Definition: Multiples of the median level of alpha-fetoprotein (AFP).

Data Definition: Indicates if result for the screened anomalies is positive, negative or uninterpretable.

Data Definition: Background risk of an open Neural Tube Defect (NTD).

Data Definition: Risk of an open neural tube defect (NTD) calculated from right hand side of the likelihood ratio, expressed as an unrounded figure (Cunningham, 2005).

Data Definition: Unique assigned Ultrasound Machine Number.

Data Definition: Calendar day, month, year the first sample was received by the prenatal screening laboratory.

Data Definition: Primary indication for amniocentesis.

Data Definition: Unique identification number and name of testing centre (lab) where PS specimen has been analyzed.

Data Definition: Indicates if a Multiple Marker Screening Test is a repeat test.

Data Definition: Indicates the presence of AChE (acetylcholinesterase) bands in amniotic fluid. Results received from Winnipeg are reported as Normal, Faint Fast Band, 1+ Fast Band, 2+ Fast Band, 3+ Fast Band, 4+ Fast Band or Pending. Results received from Boston are reported as detectable AChE or Non-detectable AChE.

Data Definition: Unique ID of PS sample collection lab

Data Definition: Appearance of amniotic fluid sample.

Data Definition: Indicates if the amniotic fluid is visibly contaminated with red blood cells.

Data Definition: Date of AFP measurement

Data Definition: Address for screening result

Data Definition: Address for screening result

Data Definition: Address for screening result

Data Definition: Indication of oral contraception use before and/or during pregnancy

Data Definition: Type of prenatal screening (e.g. integrated prenatal screening, first trimester screening, second trimester screening, etc).

Data Definition: Screening result is positive for Down syndrome. Calculated value indicating if a pregnant person's prenatal screening result is positive/negative for Down Syndrome.

Data Definition: Screening result is positive for ONTD. Calculated value indicating if a pregnant person's prenatal screening result is positive/negative for ONTD.

Data Definition: Screening result is positive for Trisomy 18. Calculated value indicating if a pregnant person's prenatal screening result is positive/negative for Trisomy 18.

Data Definition: Date pregnant person's information is entered in the screening software.

Data Definition: Method by which the estimated date of birth was determined for prenatal screening

Data Definition: Adjusted MoM value of second trimester serum AFP. Not in the current PNS lab feed.

Data Definition: Indicates if there has been fetal chromosome studies in the current pregnancy.

Data Definition: Defines the type of PS Screening. Values are Fluid and Serum

Data Definition: Date on which GA was determined by scan

Data Definition: Note spare fields could be used for different info in serum and fluid dataset (e.g. spare 4 (serum dataset) and spare 3 (fluid dataset) are used to identify counselling centres at one lab)

Data Definition: Note spare fields could be used for different info in serum and fluid dataset (e.g. spare 4 (serum dataset) and spare 3 (fluid dataset) are used to identify counselling centres at one lab)

Data Definition: Note spare fields could be used for different info in serum and fluid dataset (e.g. spare 4 (serum dataset) and spare 3 (fluid dataset) are used to identify counselling centres at one lab)

Data Definition: Note spare fields could be used for different info in serum and fluid dataset (e.g. spare 4 (serum dataset) and spare 3 (fluid dataset) are used to identify counselling centres at one lab)

Data Definition: Fetal ID of a multiple pregnancy

Data Definition: Pregnant person's date of birth.

Data Definition: Ancestry of pregnant person as identified by the ordering health care provider on the prenatal screening requisition.

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Data Definition: Termination of pregnancy indicated by laboratory feeds.

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Data Definition: Valid version record

Data Definition: First doctor's name on the requisition form.

Data Definition: If applicable, second doctor's name on the requisition form.