Testicular volume in a cohort of prepubertal Indian children

Al-Mendalawi, MahmoodDhahir

doi:10.4103/jiaps.jiaps_97_19

Cited by 3 publications

(2 citation statements)

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“…In this study, we displayed left and right testicular volumes of different age groups. There was no significant difference between left and right testicular volume in children, which is consistent with previous studies ( 6 ). For the studies focusing on Z-score, larger sample brought more reliable results.…”

Section: Discussionsupporting

confidence: 93%

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Referential Values of Testicular Volume Measured by Ultrasonography in Normal Children and Adolescents: Z-Score Establishment

Liu

Zhang

et al. 2021

Front. Pediatr.

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Objective: To establish Z-score regression equation derived from age for testicular volume measured by ultrasonography in normal boys aged 0 to 18 years old.Method: The length (L), width (W), and height (H) of 3,328 testicles from 1,664 Chinese boys were measured by ultrasonography. Lambert's formula: L × W × H × 0.71 was used to calculate testicular volume. Z-score regression equation derived from age was established by regression analysis of predicted values of testicular volume and standard deviations.Result: There was no significant difference between left and right testicular volumes. Testicular volume was positively correlated with age, and logarithmic transformation of testicular volume can show a fine curve fit with age. To establish Z-score regression equation derived from age, the predicted values of testicular volume used cubic regression equations, and the standard deviation used square regression equations. The Z-score regression equation derived from age was calculated by the formula: z = [lg (L × W × H × 0.71) – (−0.3524-0.01759 × x+0.009417 × x2-0.0001840 × x3)]/(0.1059+0.01434 × x-0.0005324 × x2).Conclusion: The current study provided a reference value for testicular volume of boys aged 0 to 18 years old. Z-score regression equation derived from age for testicular volume can be established. Z-score will be of great value for the testicular development assessment and disease diagnosis and follow-up.

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Section: Discussionsupporting

confidence: 93%

“…The development of normal reference interval for children should take age into consideration. In order to solve the above problem, many previous studies divided the age of children into intervals to calculate the normal reference range ( 5 , 6 ). This method is not convenient and the results obtained are not accurate enough.…”

Section: Introductionmentioning

confidence: 99%