Robson ten group classification system for Caesarean sections across Europe: A systematic review and meta-analysis

The aim of this systemic review and meta-analysis was to examine the differences in caesarean section rates across European regions and at a country level by utilizing the Robson classification system. The study has compared caesarean rates across European regions using the Robson classification to identify the drivers of caesarean section use. This review shows significant variations in caesarean section rates across European regions, ranging from 16.9 % in Northern Europe to 43.6 % in Southern Europe. There was a higher contribution of previous CS (Robson Group 5), ranging from 51.2 to 95.0 % of CS in this group to overall rates, particularly in Southern Europe (95.0 %), raises concerns about the "domino effect" of primary caesareans. This finding emphasises the critical importance of strategies to reduce primary CS rates.

Background: Caesarean section (CS) rates exhibit considerable global variation, reflecting diverse medical practices, cultural attitudes, and healthcare policies. While some regions maintain relatively low rates, others report significantly higher incidences of the procedure. Analysing these differences is crucial for understanding and developing targeted healthcare strategies and ensuring optimal maternal and neonatal outcomes. This review examines differences in CS rates in Europe according to the Robson 10 group classification.

Methods: We identified articles between January 2000 to June 2023 using MEDLINE/PubMed, CINAHL, EMBASE, Global Index Medicus, Web of Science and Cochrane library. There was no restriction on patient population, except for birth in a country of the European region. We excluded all studies that were conference proceedings and studies reported in a language other than English and Swedish.

Findings: The search generated a total of 1024 studies, out of which 44 were included, encompassing 6,641,615 births. The majority were from Northern (38 %) and Western Europe (33.5 %). CS rates varied markedly across Europe, ranging from 16.9 % in Northern region to 43.6 % in Southern Europe. The highest contribution to CS rates came from Robson Group 5 (previous CS), with contributions ranging from 51.2 % in Northern to 95.0 % in Southern Europe. The mode of birth for Robson Group 6 (nulliparous, breech) was predominately by CS (88.8 % in Northern to 92.5 % in Central-Eastern Europe).

Interpretation: CS rates continue to vary widely across Europe, with the highest rates in Southern and the lowest in Northern Europe. Previous CS and breech presentation were prominent drivers of CS rates. Region-specific strategies are needed to address these diverse factors to minimise accelerating CS rates across Europe.