Table 1 Characteristics of the study sample (n = 1,327)
From: Subclinical thyroid disorders and cognitive performance among adolescents in the United States
Characteristics | n | % |
|---|---|---|
Sex: | Â | Â |
Boys | 610 | 46.0 |
Girls | 717 | 54.0 |
Ethnicity/race: | Â | Â |
White | 346 | 26.1 |
African American | 458 | 34.5 |
Mexican American | 449 | 33.8 |
Other | 74 | 5.6 |
Poverty Income Index: | Â | Â |
Not known | 106 | 8.0 |
<1 | 429 | 32.3 |
1–2 | 354 | 26.7 |
>2 | 438 | 33.0 |
Test language: | Â | Â |
Spanish | 52 | 3.9 |
English | 1275 | 96.1 |
Age (in years): | Â | Â |
13 | 321 | 24.2 |
14 | 347 | 26.1 |
15 | 320 | 24.1 |
16 | 339 | 25.5 |