Related Experiment Video
Updated: Feb 8, 2026

Importance of Jumping Ability in Handball Throwing Speed and Accuracy
Published on: April 4, 2025
Ability of women to self-classify into the Robson ten-group classification system
Margarida Cal1, Alexandra Meira1, Nuno Clode1
1Department of Obstetrics and Gynecology, Centro Hospitalar Lisboa Norte-Hospital de Santa Maria, Lisbon, Portugal.
Objective:
Recent guidelines from WHO and the International Federation of Gynecology and Obstetrics (FIGO) state that the Robson ten-group classification system (TGCS) should be universally applied to pregnant women. Such information might enable women to make an informed decision about the place and mode of delivery. We assessed whether women could self-classify correctly according to the TGCS.
Methods:
A prospective study was conducted in a tertiary level maternity hospital between March 6 and July 31, 2017. We included post-partum women admitted to the puerperium ward. Participants were instructed to complete a multiple-choice questionnaire with a simplified description of TGCS and to classify themselves into one of the ten groups. A practitioner reclassified women into the correct TGCS group. Cohen κ was applied to measure the rate of agreement between these two evaluations.
Results:
400 women were enrolled, with a global rate of agreement of 81.8% between women's self-evaluation and the evaluation by the practitioner. A subanalysis showed that the highest rate of agreement was among the group with higher level education (84.0%).
Conclusion:
Women of different ages and education backgrounds were able to correctly classify themselves into the TGCS. The higher the educational level, the greater the rate of agreement.
Related Concept Videos
Classifying Matter by Composition
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.
A pure substance is a form of matter that has a constant composition throughout with uniform properties. For example, any sample of sucrose has the same composition and same physical properties, such as melting point, color, and sweetness, regardless of the source from which it is isolated.
A mixture is composed of two or...
Classifying Matter by State
How Data are Classified: Numerical Data
Quantitative data may be either discrete or continuous. All quantitative data that take on only specific numerical...
How Data are Classified: Categorical Data
Data are classified based on whether they are measurable or not. Categorical data cannot be measured; instead, it can be divided into categories. For example, if Y denotes a person's party affiliation, some examples of Y include...
Force Classification
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
Classification of Neurotransmitters

