QUICKPIPER :A SHORTENED VERSION OF THE PIPER FATIGUE SCALE AND DEVELOPMENT OF A SEVERITY INDEX OF CANCER RELATED FATIGUE. The QuickPIPER Index (QPI) represents the overall score for the 15 items and can assess the severity of cancer related fatigue (CRF). QPI values can be classified into 5 categories (very low, low, average, high and very high) which correspond with the severity of CRF. Here are some phrases that are commonly used to describe oneself. Read each statement and drag the marker to where represents how you feel in general or *overall for the past week, on most occasions. There are no good or bad answers. Move the slider how you feel generally.