RT Journal Article SR Electronic T1 Quantitation of digital clubbing by shadowgram technique. JF Archives of Disease in Childhood JO Arch Dis Child FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 145 OP 146 DO 10.1136/adc.54.2.145 VO 54 IS 2 A1 D Sinniah A1 A Omar YR 1979 UL http://adc.bmj.com/content/54/2/145.abstract AB Finger clubbing was quantified from the magnified silhouette of the right index finger in controls and patients with clubbing, using a simple shadowgram technique. There was good correlation between clinical assessment and measurement of both the profile angle and the hyponychial angle. The hyponychial angle appeared to be a more accurate indicator of clubbing than the profile angle.