Table 2.
Boys | Cartilaginous Stage a | Apophyseal Stage b | Epiphyseal Stage c | Bony Stage | p-Value # | Multiple Comparisons ## |
n = 52 (100) | 22 (42) | 12 (23) | 18 (35) | 0 | ||
Demographic characteristics | ||||||
Age (years) | 10.5 ± 0.6 | 11.3 ± 0.6 | 11.3 ± 0.5 | - | <0.001 | a < b **, a < c ** |
Height (cm) | 139 ± 4 | 145 ± 3 | 150 ± 5 | - | <0.001 | a < b **, a < c **, b < c ** |
Weight (kg) | 33 ± 4 | 34 ± 5 | 40 ± 7 | - | <0.001 | a < b *, a < c **, b < c * |
Appearance of voice change | 0 | 0 | 1/18 (6) | - | 0.382 | |
Sports club affiliation | 11/22 (50) | 9/12 (75) | 15/18 (83) | - | 0.067 | |
Osgood–Schlatter disease | 0 | 0 | 0 | - | - | |
Cartilage thickness (mm) | 8.1 ± 1.4 | 6.2 ± 1.2 | 5.3 ± 0.7 | - | <0.001 | a > b **, a > c ** |
Girls | Cartilaginous Stage a | Apophyseal Stage b | Epiphyseal Stage c | Bony Stage | p-Value # | Multiple Comparisons ## |
n = 72 (100) | 2 (3) | 5 (7) | 64 (89) | 1 (1) | ||
Demographic characteristics | ||||||
Age (years) | 10.0 ± 0.0 | 10.2 ± 0.4 | 11.0 ± 0.8 | 11 | 0.013 | a’< c’ **, b’ < c’ * |
Height (cm) | 132 ± 4 | 136 ± 2 | 148 ± 7 | 154 | 0.008 | b’ < c’ ** |
Weight (kg) | 29 ± 0 | 29 ± 2 | 40 ± 7 | 53 | <0.001 | a’ < c’ **, b’ < c’ ** |
Appearance of menarche | 0 | 0 | 27/64 (42) | 1/1(100) | 0.097 | |
Sports club affiliation | 2/2 (100) | 4/5 (80) | 39/64 (61) | 1/1(100) | 0.475 | |
Osgood–Schlatter disease | 0 | 0 | 5/64 (8) | 0 | 0.880 | |
Cartilage thickness (mm) | 6.9 ± 0.9 | 5.8 ± 1.2 | 4.8 ± 0.9 | 0 | 0.002 | a > c * |
Values are mean ± standard deviation or number of students (%). # by one-way analysis of variance for numerical data or by the chi-squared test for percentage data. ## by Bonferroni: a, b, c or by Games-Howell: a’, b’, c’; ** p < 0.01, * p < 0.05.