Validating the British Columbia Perinatal Data Registry: a chart re-abstraction study

Frosst, Gillian; Hutcheon, Jennifer; Joseph, KS; Kinniburgh, Brooke; Johnson, Cathe; Lee, Lily

doi:10.1186/s12884-015-0563-7

BMC Pregnancy and Childbirth

Table 2 Completion of mandatory and other maternal variables routinely used for surveillance (n = 1,084)

From: Validating the British Columbia Perinatal Data Registry: a chart re-abstraction study

Variable name	Percent complete in reabstraction^a	Percent complete in BCPDR^a	p-value if <0.05
Antenatal information
Maternal date of birth^b	100.0	100.0
Pre-pregnancy weight	83.0	76.8	<0.001
Admission weight	66.9	58.3	<0.001
Height	82.4	71.2	<0.001
Gravida^b	100.0	100.0
Last menstrual period date	73.9	68.1	<.0001
First ultrasound date	83.5	71.1	<.0001
Gestational age at first ultrasound, in weeks	83.5	71.8	<.0001
Gestational age at first ultrasound, in days (+0–6)	78.8	67.4	<.0001
In vitro fertilization^b	100.0	100.0
Total prior admissions this pregnancy^b	100.0	100.0
Smoking status	62.7	49.8	<.0001
School years completed	32.9	31.6	<.0001
Number of antenatal visits	96.9	90.4	<.0001
Blood type^b	100.0	100.0
Maternal serum screening offered^b	100.0	100.0
Hepatitis B screening completed^b	100.0	100.0
Hepatitis B screening results^d	95.0	95.1	<.0001
Group B Strep screening completed^b	100.0	100.0
Group B Strep screening results^d	83.6	82.6	<.0001
HIV screening completed^b	100.0	100.0
Labour and delivery information
Cervical dilation on admission	53.9	65.4	<.0001
Vaginal birth after cesarean delivery (VBAC) eligible^d	16.4	16.4
VBAC attempted^b	100.0	100.0
Labour type - Spontaneous	59.9	60.8	<.0001
Labour type - Augmented^c	35.9	33.5	<.0001
Labour type - Induced	23.3	22.9	<.0001
Labour type - None	16.9	16.3	<.0001
Labour type - Unknown	0.0	0.0
Primary indication for induction^b,c	100.0	100.0
Labour position^b,c	100.0	100.0
Labour presentation^b,c	100.0	100.0
Delivery position^b,c	100.0	100.0
Delivery presentation^b,c	100.0	100.0
Primary indication for operative delivery^b,c	100.0	100.0
Cesarean delivery type^b,c	100.0	100.0
Cesarean incision^b,c	100.0	100.0
Baby delivery date^b,c	100.0	100.0
Baby delivery time^b,c	100.0	100.0
Delivery provider (delivered by)^b,c	100.0	100.0
Rh immunoglobulin postpartum eligible^b	100.0	100.0
Postpartum infection^b	100.0	100.0

^aProportions based on weighted data
^bMandatory fields
^cMulti-fetal pregnancies included one record per baby delivered (n = 1,129)
^dVariable only applies to subset of population

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