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Table 4 Comparison of Testicular Volumes (ml) Obtained by Ultrasound in Normal Children and Adults at different ages Reported by 3 Groups with Volumes in Our Study Subjects Obtained Clinically (means ± SD)

From: Testicular volumes revisited: A proposal for a simple clinical method that can closely match the volumes obtained by ultrasound and its clinical application

Age group Osemlak[6] Goede et al.[7] Bahk et al.[22] (W x H x L x 0.52) Our study subjects (W-ss)3 x 0.64 p value Osemlak to Our p value Goede et al. To Our p value Bahk et al. To Our
5 years (17) 0.67 ± 0.19 (48) 0.58 ± 0.15   (24) 0.46 ± 0.07 <0.001 <0.001  
7 years (17) 0.68 ± 0.21 (62) 0.65 ± 0.17   (22) 0.56 ± 0.09 <0.05 <0.01  
9 years (17) 0.85 ± 0.31 (53) 0.79 ± 0.46   (36) 0.65 ± 0.19 <0.02 >0.05  
12 years (17) 3.29 ± 2.99 (55) 2.33 ± 1.77   (50) 2.56 ± 1.24 >0.1 >0.05  
13 years (18) 5.37 ± 2.92 (47) 4.42 ± 2.66   (18) 4.28 ± 0.96 >0.1 >0.05  
15 years (17) 8.71 ± 2.52 (26) 8.69 ± 2.91   (58) 8.01 ± 2.58 >0.1 >0.1  
17 years (17) 12.83 ± 3.94 (27) 12.12 ± 2.8   (36) 12.45 ± 1.99 >0.5 >0.5  
18 years   (23) 13.73 ± 3.51   (56) 13.16 ± 2.67   >0.1  
Adults    (1139)*13.29 ± 2.82 (102) 13.12 ± 3.17    >0.1
    (W x H x L x 0.71) 18.37 ± 3.62 ((W-ss)3 x 0.88) (102) 18.05 ± 4.36    >0.1
  1. Legend: (#) Number of observations.
  2. The equation used by Osemlak and Goede et al. was W x H x L x 0.52 and our formula (W-ss)3 x 0.64.
  3. * Calculated from the values using 0.71 as a constant.