Table 1.

Characteristics of included studies

Study	Country	Study design	Outcome investigated	Results
Torloni et al.19 2011	Argentina	Systematic review	Identify the main CS classifications used worldwide	Women-based classifications in general and Robson classification in particular would be the best position to fulfill current international needs.
Betrán et al.21 2014	United States of America	Systematic review	To gather the experience of users related to pros and cons of the adoption, implementation and interpretation of the Robson classification	The use of Robson classification is increasing rapidly and spontaneously worldwide. It is easy to implement and interpret. Modifications could be useful.
Longo et al.22 2020	Italy	Systematic review	Contribute to the contextual understanding of the increasing number of CSs being performed in Italy.	Mitigating the high rates of CSs will require a synergistic-stakeholder intervention. Although they did not apply any classification system in their research, they suggested the implementation of Robson for a better insight the causes of growing CS rates and for the development of constrictive interventions.