04 April 2026 : Clinical Research
Effect of School Backpack Weight on Shape of Children's Feet
Sabina Lizis
ABCDEF 1, Justyna Leszczak ADEF 1, Ewa Puszczałowska-Lizis ADEF 1*
DOI: 10.12659/MSM.952039
Med Sci Monit 2026; 32:e952039
Table 1 Comparison of anthropometric features of the studied girls and boys.
| Sex | χ̄±SD | Min–Max | Q25 | Me | Q75 | Statistics |
|---|---|---|---|---|---|---|
| Body mass [kg] | ||||||
| Girls | 39.80±10.07 | 23.50–71.00 | 32.00 | 39.00 | 44.50 | Z=0.34=0.736 |
| Boys | 40.05±11.50 | 28.00–78.00 | 31.00 | 37.00 | 45.50 | |
| Body height [cm] | ||||||
| Girls | 148.33±6.59 | 130.00–163.00 | 145.00 | 148.00 | 154.00 | t=0.93=0.355 |
| Boys | 147.12±7.58 | 134.00–168.00 | 141.00 | 146.00 | 153.00 | |
| BMI | ||||||
| Girls | 18.06±4.24 | 11.49–29.55 | 15.15 | 17.29 | 20.36 | Z=−0.32=0.752 |
| Boys | 18.30±4.02 | 13.06–30.09 | 15.48 | 16.72 | 20.41 | |
| χ̄ – arithmetic mean value; SD – standard deviation; Min – minimum value; Max – maximum value; Q – lower quartile; Me – median; Q – upper quartile; t – value of the test for independent variables statistics; Z – value of the Mann-Whitney U test statistics; – probability value. | ||||||