Born in Bradford Data Dictionary

Maternity records BiB pregnancy

Table ID: BiB_Pregnancy.matrecs_bib_preg

github | csv

Entity type Variables Entities Updated Related tables
Participant 144 10041 2020-11-18 matrecs_bib_meds
matrecs_bib_oedema
matrecs_bib_preg_p2
matrecs_bib_pregbp
matrecs_bib_admiss
matrecs_bib_labbp
matrecs_bib_postbp
matrecs_bib_preg_p1
matrecs_bib_preg_p3
matrecs_bib_proteinuria

Abstraction of routine information from maternal paper records for the Born in Bradford cohort. The abstraction was funded by a NIHR HTA project (11-99-02). Four trained research assistants abstracted data from maternal paper records. The abstraction was conducted in 2013. Only women with completed baseline questionnaires, oral glucose tolerance test results and birth outcomes were eligible. Data were entered straight into a web database. Accuracy of abstractions were checked on 5% of records for all abstracted data, all error rates were less than 1%. This source contains information from the current BiB pregnancy.

variable label value_type summary
BiBPregNumber Cohort recruited pregnancy number decimal mean (sd)
1.10 (0.30)

min < median < max
1.00 < 1.00 < 3.00

100.00% complete
has_matrecs_bib_preg Has maternity records bib pregnancy decimal mean (sd)
1.00 (0.00)

min < median < max
1.00 < 1.00 < 1.00

100.00% complete
has_prnprg Has: Pregnancy third trimester weight decimal 1 : has
100.00% complete
prnbp3rdtriw 3rd trimester weight decimal mean (sd)
77.45 (15.44)

min < median < max
32.00 < 75.00 < 160.00

56.80% complete
prnbp3rdtriwdate Date of 3rd trimester weighing date from 2006-12-15
to 2011-05-18

56.31% complete
prnbp3rdtriwnotdoc 3rd trimester weight not documented decimal 1 : Documented
2 : Not documented
99.95% complete
prnbpamnionoted Amniocentesis noted decimal 1 : No
2 : Yes
3 : Not documented
99.53% complete
prnbpamnioreasons Amniocentesis reasons text 11 unique values
230 non-missing values
3 to 38 characters
prnbpanaemianoted Anaemia noted decimal 1 : No
2 : Yes
3 : Not documented
99.74% complete
prnbpanaemiaresult Anaemia result decimal mean (sd)
9.13 (0.77)

min < median < max
4.50 < 9.40 < 9.90

23.02% complete
prnbpantibody Antibodies text 42 unique values
10897 non-missing values
2 to 27 characters
prnbpbookingdate Date of booking date from 2006-10-31
to 2010-12-14

99.17% complete
prnbpbplabn Number of BP obs in labour decimal mean (sd)
0.90 (0.41)

min < median < max
0.00 < 1.00 < 13.00

91.19% complete
prnbpbplabtaken Any BPs recorded in labour decimal 1 : No
2 : Yes
3 : Not documented
97.25% complete
prnbpbppostn Number of BPs recorded post partum decimal mean (sd)
3.50 (5.83)

min < median < max
0.00 < 2.00 < 155.00

97.49% complete
prnbpbppostrec Any BPs recorded postpartum decimal 1 : No
2 : Yes
3 : Not documented
99.84% complete
prnbpbppregn Number of BPs recorded in pregnancy decimal mean (sd)
10.98 (5.54)

min < median < max
0.00 < 10.00 < 115.00

99.88% complete
prnbpbppregrec Any blood pressures recorded in pregnancy decimal 1 : No
2 : Yes
3 : Not documented
99.94% complete
prnbpcervcerc Cervical Cerclage decimal 1 : No
2 : Yes
3 : Not documented
99.73% complete
prnbpchrovillsamp Chorionic villus sampling decimal 1 : No
2 : Yes
3 : Not documented
99.73% complete
prnbpchrovsreasons Reasons for chorionic villus sampling text 1 unique values
1 non-missing values
15 characters
prnbpconfetmon Continuous fetal monitoring decimal 1 : No
2 : Yes
3 : Not documented
0.46% complete
prnbpdesigpsutur Designation of person doing suturing text 3 unique values
481 non-missing values
6 to 14 characters
prnbpdischinf Vaginal discharge/infection decimal 1 : No
2 : Yes
3 : Not documented
99.84% complete
prnbpdruglab1 Other drugs during labour (1) text 64 unique values
1455 non-missing values
4 to 18 characters
prnbpdruglab2 Other drugs during labour (2) text 48 unique values
331 non-missing values
1 to 18 characters
prnbpdruglab3 Other drugs during labour (3) text 44 unique values
182 non-missing values
1 to 18 characters
prnbpdruglab4 Other drugs during labour (4) text 28 unique values
74 non-missing values
3 to 20 characters
prnbpdruglab5 Other drugs during labour (5) text 15 unique values
34 non-missing values
7 to 15 characters
prnbpdruglab6 Other drugs during labour (6) text 11 unique values
15 non-missing values
8 to 18 characters
prnbpdruglab7 Other drugs during labour (7) text 4 unique values
4 non-missing values
10 to 15 characters
prnbpdruglab8 Other drugs during labour (8) text 1 unique values
1 non-missing values
14 characters
prnbpeclampconv Eclamptic convulsions decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbpelectcaes Elective caesarean decimal 1 : No
2 : Yes
3 : Not documented
99.95% complete
prnbpexhyper Preexisting hypertension decimal 1 : No
2 : Yes
95.34% complete
prnbpextceph External cephallic version decimal 1 : No
2 : Yes
3 : Not documented
99.89% complete
prnbpfolicacid Folic acid in last 6 months decimal 1 : No
2 : Yes
3 : Not documented
99.73% complete
prnbpgdm GDM diagnosed decimal 1 : No
2 : Yes
3 : Not documented
99.84% complete
prnbpgdmt_diet GDM treatment: diet decimal 1 : No
2 : Yes
3 : Not documented
4.41% complete
prnbpgdmt_insulin GDM treatment: insulin decimal 1 : No
2 : Yes
3 : Not documented
5.30% complete
prnbpgdmt_lifestyle GDM treatment: lifestyle changes decimal 1 : No
2 : Yes
3 : Not documented
3.03% complete
prnbpgdmt_metformin GDM treatment: metformin decimal 1 : No
2 : Yes
3 : Not documented
0.46% complete
prnbpgdmt_none GDM no treatment decimal 1 : No
2 : Yes
3 : Not documented
15.20% complete
prnbpgdmt_notdoc GDM treatment not documented decimal 1 : Documented
2 : Not documented
0.23% complete
prnbpgenherpes Genital herpes decimal 1 : No
2 : Yes
3 : Not documented
99.89% complete
prnbpgestaged3rdtriw Gestational age at 3rd trimester weight measurement (weeks) decimal mean (sd)
254.18 (18.84)

min < median < max
29.00 < 256.00 < 295.00

56.28% complete
prnbpgestagew3rdtriw Gestational age at 3rd trimester weight measurement (weeks) decimal mean (sd)
36.31 (2.69)

min < median < max
4.14 < 36.57 < 42.14

56.28% complete
prnbpgestht Gestational hypertension decimal 1 : No
2 : Yes
99.60% complete
prnbpgonorrhoea Gonorrhoea decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnbphdp HDP category decimal 1 : Normotensive
2 : Gestational HT
3 : Pre-eclampsia
99.60% complete
prnbphepatitisb Hepatitis b decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnbphyperemesis Hyperemesis decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbpintfetmon Intermittent fetal monitoring decimal 1 : No
2 : Yes
3 : Not documented
0.51% complete
prnbpivf In vitro fertilisation decimal 1 : No
2 : Yes
3 : Not documented
99.89% complete
prnbplaburprot Was urine tested for protein in labour decimal 1 : No
2 : Yes
3 : Not documented
96.49% complete
prnbpoedemalab Any oedemas recorded in labour decimal 1 : No
2 : Yes
3 : Not documented
95.87% complete
prnbpoedemapreg Any oedemas recorded in pregnancy decimal 1 : No
2 : Yes
3 : Not documented
98.91% complete
prnbpoligohydram Oligohydramnios decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnbpothmed Other medications taken in last 6 months (y/n) decimal 1 : No
2 : Yes
3 : Not documented
99.30% complete
prnbpothmedn Other medications taken in last 6 months (count) decimal mean (sd)
0.46 (0.74)

min < median < max
0.00 < 0.00 < 6.00

97.37% complete
prnbppainrellab1 Pain relief in labour (1) text 19 unique values
1728 non-missing values
1 to 19 characters
prnbppainrellab2 Pain relief in labour (2) text 14 unique values
848 non-missing values
1 to 19 characters
prnbppainrellab3 Pain relief in labour (3) text 11 unique values
310 non-missing values
1 to 19 characters
prnbppainrellab4 Pain relief in labour (4) text 7 unique values
88 non-missing values
1 to 18 characters
prnbppainrellab5 Pain relief in labour (5) text 6 unique values
17 non-missing values
1 to 18 characters
prnbppainrellab6 Pain relief in labour (6) text 2 unique values
3 non-missing values
1 to 18 characters
prnbpperinealtr Perineal trauma decimal 1 : None
10 : Not documented
2 : 1st degree
3 : 2nd degree
4 : 3rd degree
5 : 4th degree
6 : Episiotomy
7 : Laceration
8 : Tear
9 : Graze
15.50% complete
prnbpplacpraev Placenta praevia decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbppolyhydr Polyhydramnios/hydramnios decimal 1 : No
2 : Yes
3 : Not documented
99.91% complete
prnbppostadmany Any hospital admissions postpartum decimal 1 : No
2 : Yes
3 : Not documented
98.61% complete
prnbppostadmn Number of hospital admissions post partum decimal mean (sd)
0.01 (0.09)

min < median < max
0.00 < 0.00 < 3.00

97.96% complete
prnbppostsutexam Post suturing examination decimal 1 : No
2 : Yes
3 : Not documented
7.23% complete
prnbppreeclampsia Pre-eclampsia decimal 1 : No
2 : Yes
99.60% complete
prnbppregadmany Any hospital admissions in pregnancy decimal 1 : No
2 : Yes
3 : Not documented
16.48% complete
prnbppregadmn Number hospital admissions in pregnancy decimal mean (sd)
0.82 (1.32)

min < median < max
0.00 < 0.00 < 15.00

16.39% complete
prnbppresutexam Pre suturing examination decimal 1 : No
2 : Yes
3 : Not documented
7.43% complete
prnbprenalpreg Any renal function recorded in pregnancy decimal 1 : No
2 : Yes
3 : Not documented
99.54% complete
prnbprenalpregn Number of renal function observations decimal mean (sd)
1.57 (1.96)

min < median < max
0.00 < 1.00 < 21.00

99.03% complete
prnbpsfetgrthret Suspected fetal growth retardation decimal 1 : No
2 : Yes
3 : Not documented
99.91% complete
prnbpsyphilis Syphilis decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbpthrpreterm Threatened preterm birth decimal 1 : No
2 : Yes
3 : Not documented
99.91% complete
prnbpurtrinf Urinary tract infection decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbpvagbld1st Vaginal bleeding 1st trimester decimal 1 : No
2 : Yes
3 : Not documented
99.91% complete
prnbpvagbld2nd Vaginal bleeding 2nd trimester decimal 1 : No
2 : Yes
3 : Not documented
99.90% complete
prnbpvagbld3rd Vaginal bleeding 3rd trimester decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnpbaddvit Pregnancy vitamins in last 6 months decimal 1 : No
2 : Yes
3 : Not documented
99.62% complete
prnpbgestagedpregbk Gestational age in days at BiB pregnancy booking decimal mean (sd)
89.36 (26.37)

min < median < max
0.00 < 84.00 < 271.00

99.01% complete
prnpbgestagewpregbk Gestational age in weeks at BiB pregnancy booking decimal mean (sd)
12.77 (3.77)

min < median < max
0.00 < 12.00 < 38.71

99.01% complete
prnprexconany Any pre-existing condition decimal 1 : No
2 : Yes
3 : Not documented
88.43% complete
prnprexconasthma Pre-existing asthma decimal 1 : No
2 : Yes
3 : Not documented
23.27% complete
prnprexconbackprob Pre-existing back problems decimal 1 : No
2 : Yes
3 : Not documented
21.58% complete
prnprexcondoth1 Other pre-existing condition 1 text 291 unique values
2520 non-missing values
1 to 42 characters
prnprexcondoth2 Other pre-existing condition 2 text 87 unique values
149 non-missing values
2 to 39 characters
prnprexcondoth3 Other pre-existing condition 3 text 22 unique values
25 non-missing values
1 to 28 characters
prnprexcondoth4 Other pre-existing condition 4 text 4 unique values
4 non-missing values
10 to 18 characters
prnprexconeclampsia Previous eclampsia decimal 1 : No
2 : Yes
3 : Not documented
17.40% complete
prnprexconepilepsy Pre-existing epilepsy decimal 1 : No
2 : Yes
3 : Not documented
17.68% complete
prnprexconfemcirc Pre-existing female circumcision decimal 1 : No
2 : Yes
3 : Not documented
17.44% complete
prnprexconfertprob Pre-existing fertility problems decimal 1 : No
2 : Yes
3 : Not documented
19.16% complete
prnprexcongeninf Pre-existing genital infection decimal 1 : No
2 : Yes
3 : Not documented
17.70% complete
prnprexcongynprob Pre-existing gynae problems decimal 1 : No
2 : Yes
3 : Not documented
18.77% complete
prnprexconheartprob Pre-existing heart problems decimal 1 : No
2 : Yes
3 : Not documented
17.86% complete
prnprexconhighbp Pre-existing high blood pressure decimal 1 : No
2 : Yes
3 : Not documented
18.41% complete
prnprexconincont Pre-existing incontinence decimal 1 : No
2 : Yes
3 : Not documented
17.88% complete
prnprexconkidprob Pre-existing kidney problems decimal 1 : No
2 : Yes
3 : Not documented
18.29% complete
prnprexconlivdis Pre-existing liver disease decimal 1 : No
2 : Yes
3 : Not documented
17.39% complete
prnprexconmentheal Pre-existing mental illness decimal 1 : No
2 : Yes
3 : Not documented
19.57% complete
prnprexconmigraine Pre-existing migraine decimal 1 : No
2 : Yes
3 : Not documented
22.38% complete
prnprexconsti Pre-existing constipation decimal 1 : No
2 : Yes
3 : Not documented
17.73% complete
prnprexcont1dm Pre-existing type 1 diabetes decimal 1 : No
2 : Yes
3 : Not documented
17.46% complete
prnprexcont2dm Pre-existing type 2 diabetes decimal 1 : No
2 : Yes
3 : Not documented
17.38% complete
prnprexcontbexp Pre-existing TB exposure decimal 1 : No
2 : Yes
3 : Not documented
17.69% complete
prnprexconthromb Pre-existing thrombosis decimal 1 : No
2 : Yes
3 : Not documented
17.48% complete
prnprexconthryroid Pre-existing thyroid problems decimal 1 : No
2 : Yes
3 : Not documented
18.53% complete
prnprfhistdiab FH of diabetes decimal 1 : No
2 : Yes
3 : Not documented
99.85% complete
prnprfhistdiabch FH of diabetes in woman’s child decimal 1 : No
2 : Yes
3 : Not documented
99.85% complete
prnprfhistdiabfa FH of diabetes in woman’s father decimal 1 : No
2 : Yes
3 : Not documented
99.85% complete
prnprfhistdiabmo FH of diabetes in woman’s mother decimal 1 : No
2 : Yes
3 : Not documented
99.85% complete
prnprfhistdiabrelnd FH of diabetes, relationship not documented decimal 1 : No family history
2 : Relatives documented
3 : Relatives not documented
4 : Family history not documented
99.85% complete
prnprfhistdiabsb FH of diabetes in woman’s sibling decimal 1 : No
2 : Yes
3 : Not documented
99.85% complete
prnprfhistecl FH of eclampsia decimal 1 : No
2 : Yes
3 : Not documented
99.83% complete
prnprfhisteclch FH of eclampsia in woman’s child decimal 1 : No
2 : Yes
3 : Not documented
99.83% complete
prnprfhisteclfa FH of eclampsia in woman’s father decimal 1 : No
2 : Yes
3 : Not documented
99.83% complete
prnprfhisteclmo FH of eclampsia in woman’s mother decimal 1 : No
2 : Yes
3 : Not documented
99.83% complete
prnprfhisteclrelnd FH of eclampsia, relationship not documented decimal 1 : No family history
2 : Relatives documented
3 : Relatives not documented
4 : Family history not documented
99.83% complete
prnprfhisteclsb FH of eclampsia in woman’s sibling decimal 1 : No
2 : Yes
3 : Not documented
99.83% complete
prnprfhisthyp FH of high blood pressure decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnprfhisthypch FH of hypertension in woman’s child decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnprfhisthypfa FH of hypertension in woman’s father decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnprfhisthypmo FH of hypertension in woman’s mother decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnprfhisthyprelnd FH of hypertension, relationship not documented decimal 1 : No family history
2 : Relatives documented
3 : Relatives not documented
4 : Family history not documented
99.87% complete
prnprfhisthypsb FH of hypertension in woman’s sibling decimal 1 : No
2 : Yes
3 : Not documented
99.87% complete
prnprfhistment FH of mental illness decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnprfhistmentch FH of mental illness in woman’s child decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnprfhistmentfa FH of mental illness in woman’s father decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnprfhistmentmo FH of mental illness in woman’s mother decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnprfhistmentrelnd FH of mental illness, relationship not documented decimal 1 : No family history
2 : Relatives documented
3 : Relatives not documented
4 : Family history not documented
99.88% complete
prnprfhistmentsb FH of mental illness in woman’s sibling decimal 1 : No
2 : Yes
3 : Not documented
99.88% complete
prnprfhistthrom FH of thrombosis decimal 1 : No
2 : Yes
3 : Not documented
99.86% complete
prnprfhistthromch FH of thrombosis in woman’s child decimal 1 : No
2 : Yes
3 : Not documented
99.86% complete
prnprfhistthromfa FH of thrombosis in woman’s father decimal 1 : No
2 : Yes
3 : Not documented
99.86% complete
prnprfhistthrommo FH of thrombosis in woman’s mother decimal 1 : No
2 : Yes
3 : Not documented
99.86% complete
prnprfhistthromrelnd FH of thrombosis, relationship not documented decimal 1 : No family history
2 : Relatives documented
3 : Relatives not documented
4 : Family history not documented
99.86% complete
prnprfhistthromsb FH of thrombosis in woman’s sibling decimal 1 : No
2 : Yes
3 : Not documented
99.86% complete