Table 3.
Effect of timing of LT4 ingestion (fasting, with breakfast, or at bedtime) on the arithmetic mean of thyroid analytes (TSH, FT4, T3) for hypothyroid patients and patients with thyroid cancer
| Analyte | BL | BB | WB | HS |
|---|---|---|---|---|
| Hypothyroid patients | ||||
| Mean TSH, mIU/liter (sd) | 1.77 (1.20) | 1.54 (1.27) | 3.74 (3.55) | 2.79 (2.15) |
| Mean FT4, ng/dl (sd) | 1.20 (0.23) | 1.23 (0.22) | 1.16 (0.22) | 1.2 (0.25) |
| Mean T3, ng/dl (sd) | 128 (24) | 125 (33) | 121 (25) | 123 (24) |
| Thyroid cancer patients | ||||
| Mean TSH, mIU/liter (sd) | 0.29 (0.50) | 0.27 (0.58) | 1.41 (2.02) | 1.14 (3.12) |
| Mean FT4, ng/dl (sd) | 1.45 (0.30) | 1.57 (0.28) | 1.39 (0.24) | 1.50 (0.28) |
| Mean T3, ng/dl (sd) | 136 (29) | 134 (32) | 127 (28) | 129 (29) |
SI conversions: to convert FT4 to picomoles per liter, multiply by 12.871; and to convert T3 to nanomoles per liter, multiply by 0.0154. BL, Baseline.