Errors in the classification of pregnant women according to Robson ten-group classification system

•Manual reclassification revealed a relevant number of TGCS misclassifications.•Misclassifications lead to incorrect Caesarean section rates in certain Robson groups.•Core variables on parturients need to be defined precisely.•Correct data entry is a prerequisite for further data processing. The Rob...

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Published in:	European journal of obstetrics & gynecology and reproductive biology 2024-04, Vol.295, p.53-57
Main Authors:	Gantt, Deirdre Marlene, Misselwitz, Björn, Boos, Vinzenz, Reitter, Anke
Format:	Article
Language:	eng
Subjects:	Cesarean Section Databases, Factual Epidemiology Female Humans Labor, Obstetric Parturition Perinatal health Pregnancy Pregnant Women Quality indicators Robson classification Ten-Group Classification System
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Summary:	•Manual reclassification revealed a relevant number of TGCS misclassifications.•Misclassifications lead to incorrect Caesarean section rates in certain Robson groups.•Core variables on parturients need to be defined precisely.•Correct data entry is a prerequisite for further data processing. The Robson Ten-Group Classification System (TGCS) is widely used as a classification system for perinatal analyses such as Caesarean section (CS) rates. In Germany, standardised data sets on deliveries are classified by quality assurance institutions using the TGCS. This observational study aims to evaluate potential errors in the TCGS classification of deliveries. Manual TGCS classification of all 1370 deliveries in an obstetric unit in 2018 and comparison with semi-automatic TGCS classifications of the quality assurance institution. In the manual classification, 259 out of 1370 births (18.9 %) were assigned to a different Robson group than in the semi-automatic classification. The proportions of births by Robson group were significantly different in TGCS group 1 (32.2 % vs. 37.6 %, p = 0.0034) and group 2 (18.4 % vs. 14.4 %, p = 0.0053). Concordance between manual and semi-automatic classifications ranged from 59.5 % in group 2 to 100.0 % in groups 6, 7, 8, and 9. The most frequent mismatches were for the parameters “onset of labour” in 184 cases (13.4 %), “parity” in 42 cases (3.1 %) and “previous uterine scars” in 23 cases (1.7 %). In the manual classification, there were significant differences in the CS rate in group 1 (7.9 % vs. 2.5 %, p
ISSN:	0301-2115 1872-7654