Performance
The study included 198 boys and 180 girls with a mean age of 9.4 and 9.2 years, respectively. Unadjusted median (25–75 IQR) of 25(OH)D and iPTH concentrations were 13.8 (10.0–19.6) ng/mL and 33.1 (22.3–48.6) pg/mL, respectively, among boys and 9.9 (6.4–15.8) ng/ml and 47.8 (32.8–76.1) pg/mL, respectively, among girls. The prevalence of obesity and BMI z-score among boys was higher than girls (p<0.001). There were higher serum concentrations of PTH and lower 25(OH)D in girls, compared to boys (p = 0.036 and p<0.001, respectively). Regarding dietary intakes, the boys consumed more energy (p<0.001), calcium (p = 0.001), vitamin D (p = 0.012), magnesium(p = 0.002), and phosphorous (p<0.001) in comparison to girls.
Predicated on nonlinear regression habits, the relationship ranging from 25(OH)D and you can iPTH are rapid. The new estimated repaired effects (and you will practical error) were: an excellent = step three.598 (0.110), b = 0.868 (0.465), c = 0.190 (0.141) during the ladies, and you can a beneficial = step three.092 (cuatro.495), b = 0.553 (cuatro.338), c = 0.014 (0.151) in boys.