Table 2 Sample Characteristics according to BMI status ( mean values and standard deviations; numbers and percentages )
From: Exploring the complex dynamics of BMI, age, and physiological indicators in early adolescents
|  | Quartile 1 ( <16.9 kg/m2 ) | Quartile 2(16.9-18.8 kg/m2) | Quartile 3(18.8-21.6 kg/m2) | Quartile 4(>21.6 kg/m2) | χ2/F | P values | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | Mean | SD | Mean | SD | mean | SD | mean | SD | Â | Â |
Gender | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Male ( n, % ) | 371 ( 48.6 ) | 396 ( 49.0 ) | 356 ( 46.2 ) | 427 ( 55.4 ) | 14.2 | 0.003 | ||||
Female ( n, % ) | 393 ( 51.4 ) | 412 ( 51.0 ) | 414 ( 53.8 ) | 344 ( 44.6 ) | Â | Â | ||||
Hypertension ( n, % ) | 116 (15.2) | 160 (19.8) | 178 (23.1) | 294 (38.1) | 125.02 | <0.0001 | ||||
MetS ( n, % ) | 0 | 0 | 0 | 76 (9.9) | 233.0 | <0.0001 | ||||
Age ( n, % ) | Â | Â | Â | Â | Â | Â | Â | Â | 252.23 | <0.0001 |
10 years old | 292 ( 38.2 ) | 157 ( 19.4 ) | 111 ( 14.4 ) | 111 ( 14.4 ) | Â | Â | ||||
11 years old | 197 ( 25.8 ) | 170 ( 21.0 ) | 146 ( 18.9 ) | 164 ( 21.3 ) | Â | Â | ||||
12years old | 142 ( 18.6 ) | 217 ( 26.9 ) | 181 ( 23.5 ) | 200 ( 25.9 ) | Â | Â | ||||
13years old | 95 ( 12.4 ) | 159 ( 19.7 ) | 190 ( 24.7 ) | 169 ( 21.9 ) | Â | Â | ||||
14years old | 38 ( 5.0 ) | 105 ( 12.9 ) | 142 ( 18.4 ) | 127 ( 16.5 ) | Â | Â | ||||
Blood glucose ( mmol/L ) | 5.2 | 0.5 | 5.2 | 0.6 | 5.3 | 0.5 | 5.3 | 0.5 | 6.2 | <0.001 |
Hemoglobin ( g/L ) | 135.6 | 10.2 | 138.1 | 12.0 | 138.4 | 13.0 | 138.8 | 13.0 | 10.6 | <0.001 |
Total cholesterol ( mmol/L ) | 3.9 | 0.6 | 3.9 | 2.7 | 4.1 | 9.8 | 3.9 | 0.7 | 0.5 | 0.7018 |
Triglyceride ( mmol/L ) | 0.9 | 0.3 | 0.9 | 0.4 | 0.9 | 0.4 | 1.2 | 1.8 | 17.8 | <0.001 |
HDL-C ( mmol/L ) | 1.6 | 0.3 | 1.5 | 0.3 | 1.4 | 0.3 | 1.6 | 7.6 | 0.3 | 0.8287 |
LDL-C ( mmol/L ) | 2.0 | 0.6 | 1.9 | 0.6 | 2.0 | 0.6 | 2.1 | 0.6 | 18.8 | <0.001 |
Blood uric acid ( µmol/L ) | 282.5 | 62.8 | 305.7 | 72.9 | 324.2 | 74.8 | 360.9 | 85.0 | 152.6 | <0.001 |
Serum creatinine ( µmol/L ) | 47.6 | 8.0 | 50.8 | 9.3 | 53.0 | 10.3 | 52.8 | 9.8 | 54.4 | <0.001 |
Ferritin ( ng/mL ) | 56.8 | 29.3 | 53.0 | 29.7 | 51.6 | 32.8 | 58.0 | 37.5 | 6.7 | 0.001 |
Transferrin receptor ( mg/L ) | 3.3 | 0.9 | 3.3 | 1.0 | 3.5 | 1.3 | 3.8 | 1.3 | 11.3 | <0.001 |
hs-CRP ( mg/L ) | 0.7 | 2.1 | 0.7 | 2.6 | 0.8 | 2.1 | 1.8 | 8.2 | 11.3 | <0.001 |
Albumin ( g/L ) | 48.9 | 2.7 | 49.1 | 2.7 | 49.3 | 3.1 | 49.4 | 3.2 | 5.6 | <0.001 |
Total protein ( g/L ) | 75.1 | 4.4 | 75.6 | 4.8 | 76.2 | 4.8 | 77.2 | 4.6 | 28.6 | <0.001 |
Serum Zn ( µg/dL ) | 89.78 | 29.11 | 92.61 | 47.74 | 91.67 | 34.95 | 91.63 | 43.18 | 0.50 | 0.4814 |
Vitamin A ( mg/l ) | 0.4 | 0.1 | 0.4 | 0.1 | 0.4 | 0.1 | 0.4 | 0.1 | 43.4 | <0.001 |
Vitamin D ( ng/mL ) | 16.3 | 5.8 | 15.5 | 6.1 | 15.4 | 5.9 | 16.0 | 6.1 | 3.7 | 0.0111 |