Yangjun Liu

Yangjun Liu

Postdoctoral researcher


About me

I used to be a physician and now a postdoctoral researcher focusing on epidemiology and statistics. 

Research description

Psychiatric comorbidity 

I am interested in examining the familial coaggregation of psychiatric comorbidity and the association between psychiatric disorders and somatic diseases using Swedish population-based registers and Swedish Twin Register.

Recovery after cancer surgery

I am interested in improving health related quality of life, symptom management, and survival after thoracic (esophageal and lung) cancer surgery using patient-reported outcome data and register-based data.

Methods used in my research

My research uses diverse study designs including family study, twin study, longitudinal study with repeated measures, randomized controlled trial, and qualitative study. I am familial with several advanced statistical methods such as multilevel data analysis (e.g., mixed effects model, fixed effects regression model, and latent growth curve model), survival analysis, factor analysis, structural equation modeling, familial co-aggregation analysis, twin analysis, etc. I am good at statistical software STATA, R, and Mplus, but also have experience in using SAS and SPSS.

Teaching portfolio

Applied Biostatistics (Doctoral level), Teaching assistant, Karolinska Institutet, 2022

Epidemiology I: Introduction to epidemiology (Doctoral level), Teaching assistant, Karolinska Institutet, 2022

Study Design in Clinical Research (Doctoral level), Teaching assistant, Karolinska Institutet, 2022


PhD in Medical Science, Department of Molecular Medicine and Surgery, Karolinska Institutet 

MD (Medical Degree with a medical doctor license) in Clinical Medicine, Xiangya School of Medicine, Central South University

In addition, I have got trained in psychology and have psychological counselor license.