Table 1.
General characteristics of schoolchildren of northeastern Mexico.
| All (n = 274) |
Female (n = 136) |
Male (n = 138) |
p Value | |
|---|---|---|---|---|
| Age (yr) * | 9 (7–10) | 9 (7–10) | 9 (7–10) | 0.3669 |
| UIC ( μg/L ) * | 442 (290–671) | 444 (265–669) | 432 (293–682) | 0.3595 |
| TSH ( μUI/mL ) * | 4.1 (3.8–4.5) | 4.1 (3.8–4.7) | 4.0 (3.8–4.3) | 0.0133 |
| Prevalence (%) of TSH > 5 ( μ UI/mL) ** | 5.3 (5.0–6.1) | 5.1 (5.0–6.0) | 5.9 (5.1–7.8) | 0.1038 |
| TSH ( μ UI/mL), 90th pctl | 4.9 | 5.0 | 4.8 | - |
| TSH ( μ UI/mL), 95th pctl | 5.3 | 5.4 | 5.2 | - |
| Weight status ** | ||||
| Underweight, n (%) | 12 (4.4%) | 5 (3.7%) | 7 (5.1%) | 0.3948 |
| Normal weight, n (%) | 151 (55.1%) | 78 (57.4%) | 73 (52.9%) | 0.2678 |
| Overweight, n (%) | 51 (18.6%) | 29 (21.3%) | 22 (15.9%) | 0.1613 |
| Obese, n (%) | 60 (21.9%) | 24 (17.6%) | 36 (26.1%) | 0.0612 |
| Waist circumference ** | ||||
| <10th pctl, n (%) | 25 (9.1%) | 5 (3.7%) | 20 (14.5%) | 0.0015 |
| 10th–90th pctl, n (%) | 188 (68.6%) | 100 (73.5%) | 88 (63.8%) | 0.0535 |
| >90th pctl, n (%) | 61 (22.3%) | 31 (22.8) | 30 (21.7%) | 0.4742 |
* Median and interquartile ranges (IQR) 25th–75th pctl and median compared by sex using the Mann–Whitney U Test. ** Comparison of proportions by sex were analyzed using the Fisher’s exact test. A p < 0.05 was considered significant.