Predictive power of penile/brachial index in diagnosing male sexual impotence Ray C.-J Chiu, M.D., Ph.D., F.R.C.S.C., Donna Lidstone, R.N., Peter E. Blundell, M.D., F.R.C.S.C. Journal of Vascular Surgery Volume 4, Issue 3, Pages 251-256 (September 1986) DOI: 10.1016/0741-5214(86)90194-1 Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
Fig. 1 Probability of organic impotence (no nocturnal erection) at various levels of penile/brachial (P/B) index. Patients were divided into four groups according to their risk factors. PVD = peripheral vascular disease; Diab = diabetes mellitus. Journal of Vascular Surgery 1986 4, 251-256DOI: (10.1016/0741-5214(86)90194-1) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
Fig. 2 Probability of clinical impotence (no penetration) at various levels of penile/brachial (P/B) index. Patients divided into four groups according to their risk factors. PVD = peripheral vascular disease; Diab = diabetes mellitus. Journal of Vascular Surgery 1986 4, 251-256DOI: (10.1016/0741-5214(86)90194-1) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions
Fig. 3 Hypothetical chart depicts two extremes of diagnostic power of a test. The “non-diagnostic” example shows incidence of impotence unchanged at all levels of penile/brachial index (PBI), whereas the “diagnostic” example shows clear cut-off point in PBI, with marked difference in incidence of impotence above and below this PBI level. Journal of Vascular Surgery 1986 4, 251-256DOI: (10.1016/0741-5214(86)90194-1) Copyright © 1986 Society for Vascular Surgery and North American Chapter, International Society for Cardiovascular Surgery Terms and Conditions