Figure 3: Classification responses of recursive partition analysis of the combined noninvasive parameters of near-infrared spectroscopy (NIRS), prostate volume, maximum flow rate (), and International Prostate Symptom Score (IPSS). ( value); prob: probability of having the diagnosis either obstructed or unobstructed. The total number of patients is 36. The number of true positives is 25 of 28, the number of false positives is 1 of 8, the number of true negatives is 7 of 8, and the number of false negatives is 3 of 28. The sensitivity and specificity for obstruction are 89.3% and 88%, respectively, [AUC: 0.96]. It is to be mentioned that these statistical values need to be tested in a new set of patients before they can be considered for clinical application.