The Congo Red Dot (CRD) Paper Test is a simple, non-invasive, low technology, easy to use point-of-care clinical tool for rapid identification of women with preeclampsia, says a study published March 1, 2019 in E-Clinical Medicine. Proteins in the urine of women with preeclampsia (PE) bind Congo Red dye (urine congophilia). The CRD Paper Test outperformed measured serum and urine markers (80·2% sensitivity, 89·2% specificity, 92·1% negative predictive value, 86·7% accuracy). The pre-test, positive and negative post-test probabilities were 27·7%, 74·0%, and 8·0%, respectively.