Inverse probability weighted generalised estimating equations for longitudinal data
The investigation of lung function in a population plays an important role in diagnosis and assessment of many airway diseases. In addition, an overview of the lung function status can help provide better health-care options and inform medical decisions. When studying the lung function, the collection of measurements (data) of the lung function from voluntary individuals is a crucial part. Often,Longitudinal study designs, in which variables of interest are observed at multiple time points in a study population, are frequently used in clinical research. Missing data are common in these types of studies. Moreover, in studies investigating a population where the mortality rate is high, data can be truncated by death. To handle missing or truncated data, it is important to investigate the un