16. Specificity and sensitivity of the b/a and d/a indicators Ref. Toshiaki OTSUKA , Tomoyuki KAWADA , Masao KATSUMATA , Chikao IBUKI , and Yoshiki KUSAMA Independent Determinants of Second Derivative of the Finger Photoplethysmogram among Various Cardiovascular Risk Factors in Middle-Aged Men Hypertens Res Vol. 30, No. 12 (2007)
29. Impedance Components Phase Angle Xc = 1 / (2 * PI * F * C), C – Capacity [Farad] Phase Angle = Arctan (Xc / R)
30. Clinical application in survival in colorectal cancer The survival curves for the 2 categories of phase angle are shown. Patients with a phase angle < 5.57 had a median survival of 8.6 mo (95% CI: 4.8, 12.4; n = 26), and those with a phase angle > 5.57 had a median survival of 40.4 mo (95% CI: 21.9, 58.8; n = 26); this difference was significant ( P = 0.0001).