Features include

Microsoft Windows commands and user interface
rapid import of source data as a simple text(ASCII)file containing all original observations
display of the distribution with a possibility to rapidly calculate any percentile and the corresponding confidence limits
estimation of non-parametric reference limits, median or any percentile in the distribution with the corresponding confidence limits
possibility to choose statistically optimized bin width for illustrative presentation of frequency histograms
display of two distributions for comparison of health- and illness-related data
automatic updating of clinical sensitivity and specificity values with mouse movement
display of clinical sensitivity and specificity with the corresponding confidence intervals, positive and negative likelihood ratios, predictive values and efficiency at any level of test result
rapid updating of predictive values and efficiency to any entered prior probability of disease
optional presentation of sensitivity, specificity and/or efficiency curves for the complete range of possible cutoff limits
Receiver operating characteristics (ROC-) curve features include

display of one or several curves
calculation of areas under curve by non-parametric method including estimation of respective standard errors for the area
statistical comparison of areas under two ROC curves either by the paired or unpaired method
statistical comparison of points on two ROC curves either by the paired or unpaired method
optional possibility to estimate partial areas under ROC curves

quick and simple data import and export between GraphROC and other software
easy export of graphs for editing and e.g. for making slides or figures for publication
The following features of the program have, to our knowledge, not been included in previously available laboratory test evaluation software:
possibility to automatically optimize the bin width for display of frequency histograms and producing non-parametric ROC curves (Kairisto, 1995)
possibility to estimate also partial areas under the ROC curve (see Zweig & Campbell, 1993)
estimation of non-parametric reference change limits and corresponding confidence limits
optional indirect estimation of "health" related limits from patient data, where majority of the values can be considered to be representative of health-related values
optional indirect estimation of "health" related change intervals from unselected or partially selected serial patient data, where majority of the values can be considered to be representative of health-related values (Kairisto, Virtanen, Uusipaikka et al. 1993)
Full advantage of all features in GraphROC for Windows will be achieved if the program is used together with other programs running under Microsoft Windows. Data import and export, graph export, and switching from one program to another allow convenient use of GraphROC together with other Windows applications.

GraphROC