Key Variables
| Variable | Mean | 95% CI |
|---|---|---|
| Total count ratio of right-lobe activity to left-lobe activity | 1.5 | 1.03–2.02 |
| CPP ratio of right-lobe activity to left-lobe activity | 1.29 | 0.98–1.60 |
| Area | 33.8 cm2 | 31.1–36.5 |
| Size, right | 3092 pixels | 2,848–3,340 |
| Size, left | 2937 pixels | 2,662–3,212 |
| Ratio of thyroid to background | 4.06 | 3.43–4.69 |
| Right | 4.01 CPP | 3.49–4.52 |
| Left | 4.08 CPP | 3.28–4.89 |
| Ratio of dose to total counts | 4.85 | 3.44–6.26 |
| FT4 | 21.1 pmol/L | 18.1–24.2 |
| FT3 | 7.1 pmol/L | 5.1–9.1 |
| Thyroid-stimulating hormone | 4.2 pmol/L | 2.3–6.1 |