3 papers
stat.ME2021
A new weighting method when not all the events are selected as cases in a nested case-control study
Qian M. Zhou, Xuan Wang, Yingye Zheng +1
Nested case-control (NCC) is a sampling method widely used for developing and evaluating risk models with expensive biomarkers on large prospective cohort studies. The biomarker va…
stat.ME2020
Is the new model better? One metric says yes, but the other says no. Which metric do I use?
Qian M. Zhou, Zhe Lu, Russell J. Brooke +2
Incremental value (IncV) evaluates the performance change from an existing risk model to a new model. It is one of the key considerations in deciding whether a new risk model perfo…
stat.ME2016
A Threshold-free Prospective Prediction Accuracy Measure for Censored Time to Event Data
Yan Yuan, Qian M. Zhou, Bingying Li +3
Prediction performance of a risk scoring system needs to be carefully assessed before its adoption in clinical practice. Clinical preventive care often uses risk scores to screen a…