Table 2.
Thyroid hormonal levels within the normal range, incidences of thyroid dysfunction, and rates of treatment and follow-up in the SGA and AGA groups
| SGA(n = 189) | AGA(n = 661) | P-value | |
|---|---|---|---|
| Thyroid hormone levels within the normal rangec | |||
| TSH (mU/L)a | 3.74 (2.28 ~ 6.18) | 3.01 (1.81 ~ 5.41) | 0.018 |
| FT4 (pmol/L)b | 17.76 ± 3.94 | 17.42 ± 3.71 | 0.371 |
| FT3 (pmol/L) | 3.57 ± 0.73 | 3.51 ± 0.69 | 0.362 |
| Thyroid dysfunction determined by TFTs | |||
| Transient Hypothyroidism | 4 (2.12) | 10 (1.51) | 0.565 |
| Transient Hypothyroxinemia | 22 (11.64) | 83 (12.56) | 0.576 |
| TH with dTSHed | 3 (1.59) | 2 (0.30) | 0.005 |
| Hyperthyrotropinemia | 21 (11.11) | 59 (8.93) | 0.331 |
| Low T3 syndrome | 9 (4.76) | 37 (5.60) | 0.413 |
| Treatment and follow-up | |||
| L-T4 treatment | 55 (29.10) | 137 (20.73) | 0.015 |
| Follow-up months | |||
| 0 ~ 6 m | 44 (23.28) | 96 (14.75) | 0.004 |
| 7 ~ 12 m | 5 (2.65) | 16 (2.46) | 0.861 |
| 13 ~ 18 m | 1 (0.53) | 4 (0.61) | 0.904 |
| > 18 m | 4 (2.12) | 9 (1.38) | 0.456 |
a Presented as median (interquartile range)
b Presented as mean ± standard deviation
c Normal range: TSH 1.3 ~ 9.91 mU/L for male, 0.77 ~ 19.42 mU/L for female; FT4 11.85 ~ 33.81 pmol/L; FT3 2.63 ~ 5.70 pmol/L
d TH with dTSHe: Transient hypothyroxinemia with delayed TSH elevation