Portal de Periódicos da CAPES

Artigo Produção Nacional Revisado por pares

BIBTEX RIS

Clinical Measurement of Testicular Volume in Adolescents: Comparison of the Reliability of 5 Methods

1996; Lippincott Williams & Wilkins; Volume: 156; Issue: 6 Linguagem: Inglês

10.1016/s0022-5347(01)65433-8

1527-3792

Eugênio Chipkevitch, Roberto T. Nishimura, Daisy G. S. Tu, Manuel Galea,

Male Reproductive Health Studies

No AccessJournal of UrologyPediatric Urology1 Dec 1996Clinical Measurement of Testicular Volume in Adolescents: Comparison of the Reliability of 5 Methods Eugenio Chipkevitch, Roberto T. Nishimura, Daisy G.S. Tu, and Manuel Galea-Rojas Eugenio ChipkevitchEugenio Chipkevitch , Roberto T. NishimuraRoberto T. Nishimura , Daisy G.S. TuDaisy G.S. Tu , and Manuel Galea-RojasManuel Galea-Rojas View All Author Informationhttps://doi.org/10.1016/S0022-5347(01)65433-8AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: Measurement of the testis is a more readily available method of estimating spermatogenesis. Doubt remains about the best instrument for measuring testicular volume. Lack of bias or accuracy of instruments has received too much emphasis in some studies, while to our knowledge no one has yet appropriately compared reliability statistically. We propose a simple new method for measuring testicular size based on visual comparison with graphic models, and describe the reliability and bias of this and 4 traditional methods. Materials and Methods: Measurements of 42 adolescent testes were made in a certain sequence: graphic method, dimensional measurement, Prader orchidometer, ring orchidometer and ultrasound with ultrasound assumed to be the standard. Statistical analysis was based on the linear structural model. Results: Statistical tests indicated that all 5 methods are equally reliable (R greater than 0.9). Although they are not equally accurate, actual testicular size can be calculated using each of these 5 methods and the equations of the linear structural model. Conclusions: The new graphic method proposed in this study is as reliable as other well-known methods for measuring testicular size. Actual testicular volume can be estimated without bias and with equal reliability from any of the 5 methods using the equations of the linear structural model. This statistical approach is more relevant than the sole comparison of lack of bias or accuracy, which has been the main concern of previous studies. References 1 : Measurement of testicular volume. Its application to assessment of maturation, and its use in diagnosis of hypogonadism.. Arch. Dis. Child.1962; 37: 514. Google Scholar 2 : Primary and secondary sexual characteristics: study of their development in males from birth through maturity, with biometric study of penis and testes.. Amer. J. Dis. Child.1943; 65: 535. Google Scholar 3 : Growth at Adolescence. Oxford: Blackwell Scientific Publications1962. Google Scholar 4 : Ultrasonic testicular texture and size in 444 men from the general population: correlation to semen quality.. Eur. Urol.1993; 24: 231. Google Scholar 5 : Significance of testicular size measurement in andrology: II. Correlation of testicular size with testicular function. J. Urol.1987; 137: 416. Link, Google Scholar 6 : Cross-sectional study of semen parameters in a large group of normal Chinese men.. Int. J. Androl.1985; 8: 257. Google Scholar 7 : Clinical measurements of testes in boys and men.. Acta Med. Scand.1952; 142: 457. Google Scholar 8 : Testicular volumes of adolescents.. J. Ped.1982; 101: 1010. Google Scholar 9 : Testicular size: assessment and clinical importance.. Triangle1966; 7: 240. Google Scholar 10 : Significance of testicular size measurement in andrology. I. A new orchiometer and its clinical application. Fertil. Steril.1983; 39: 836. Google Scholar 11 : Objective measurement of testicular volume by ultrasonography: evaluation of the technique and comparison with orchidometer estimates.. Int. J. Androl.1989; 12: 395. Google Scholar 12 : Testicular volume assessment in the adolescent with a varicocele.. J. Urol.1992; 147: 1348. Abstract, Google Scholar 13 : Vergleichende Volumetrie des menschlichen Hodens unter besonderer BerUcksichtigung der Hodensonographie, Praderorchidometer, Schirrenzirkel und Schublehre.. Andrologia1987; 19: 487. Google Scholar 14 : Measurement of testicular volume by ultrasonography.. Int. J. Androl.1990; 13: 367. Google Scholar 15 : Accuracy and reproducibility of clinical measures of testicular volume.. J. Ped.1987; 110: 914. Google Scholar 16 : Maximum likelihood estimation of simultaneous pairwise linear structural relationships.. Biometrics J.1995; 37: 673. Google Scholar 17 : Structural comparative calibration using the EM logorithm.. J. Appl. Stat.1995; 22: 277. Google Scholar 18 : Multivariate Analysis. London: Academic Press1979. Google Scholar 19 : Applied Multivariate Analysis. New York: Holt, Rinehart & Winston1972. Google Scholar 20 : Simultaneous pairwise linear structural relationships.. Biometrics1969; 25: 129. Google Scholar 21 : Estimating the accuracy of dietary questionnaire assessments: validation in terms of structural equation models.. Stat. Med.1994; 13: 127. Google Scholar Divisions of Adolescent Medicine and Radiology, Darcy Vargas Children's Hospital, Department of Biostatics, Paulista School of Medicine and Institute of Mathematics and Statistics, University of Sao Paulo, Sao Paulo, Brazil.© 1996 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited byGreenfield S, Seville P and Wan J (2018) Experience with Varicoceles in Children and Young AdultsJournal of Urology, VOL. 168, NO. 4 Part 2, (1684-1688), Online publication date: 1-Oct-2002.DIAMOND D, PALTIEL H, DiCANZIO J, ZURAKOWSKI D, BAUER S, ATALA A, EPHRAIM P, GRANT R and RETIK A (2018) COMPARATIVE ASSESSMENT OF PEDIATRIC TESTICULAR VOLUME: ORCHIDOMETER VERSUS ULTRASOUNDJournal of Urology, VOL. 164, NO. 3 Part 2, (1111-1114), Online publication date: 1-Sep-2000. Volume 156Issue 6December 1996Page: 2050-2053 Advertisement Copyright & Permissions© 1996 by American Urological Association, Inc.MetricsAuthor Information Eugenio Chipkevitch More articles by this author Roberto T. Nishimura More articles by this author Daisy G.S. Tu More articles by this author Manuel Galea-Rojas More articles by this author Expand All Advertisement PDF downloadLoading ...