BONE AGE (BA) AS PERFORMED BY THE TANNER-WHITEHOUSE (TO) METHOD. IIL RELIABILITY OF THE 5B-TECHNIQUE.

Abstract

In the II Latin American Symposium on Pediatric Endocrinology (Buenos Aires, 1986) a short-cut method -the 5B technique- for radiographic BA estimation was discussed. Five hand-wrist bones were chosen:the epiphyseal proximal phalange of the fifth finger (5), the great bone (G), the trapezius bone (T), the distal epiphysis of the radius (R), and the distal epiphysis of the ulna (U). Scores were calculated as follows: P (t)=P (R)+P (U)+11P(5)+4P (G)+3P (T);were P(t) was the total score and P the scores for each bone. In the present study, 5B was compared against TW1, TW2, RUS and CAR methods by analysis of variance and Tukey test for unequal sample sizes. Non significant differences were obtained when 5B-mean bone ages were compared against those from TW1 and TW2 methods. 5B-means gave, however, highly significant differences when compared against those from the RUS and CAR methods. It was concluded that: (a)BA estimation by the 5B-technique is as reliable as -and easier to do than- those from both TW variants; (b)RUS and CAR methods estimate BA differently than 5B and TW ones.

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