# Screening PubMed abstracts: is class imbalance always a challenge to machine learning?

> Research article (Systematic Reviews, 2019) · cited 33× · AI/ML

**Wikidata**: [openalex:W2994586973](https://www.wikidata.org/wiki/openalex:W2994586973)  
**Source**: https://4ort.xyz/entity/screening-pubmed-abstracts-is-class-imbalance-always-a-challenge-to-machine-learning