Table 1.
TSH (mIU/L) median (range) |
FT3 (pg/mL) median (range) |
FT4 (ng/dL) median (range) |
n | |
---|---|---|---|---|
January | 1.61 (0.51-5.22) | 2.97 (2.35-3.55) | 1.00 (0.83-1.20) | 628 |
February | 1.52 (0.39-5.11) | 3.14 (2.48-3.64) | 1.04 (0.86-1.26) | 651 |
March | 1.45 (0.49-4.82) | 3.10 (2.37-3.64) | 1.04 (0.83-1.29) | 554 |
April | 1.28 (0.46-4.61) | 3.35 (2.46-3.70) | 1.00 (0.82-1.22) | 382 |
May | 1.16 (0.37-4.02) | 3.32 (2.64-3.70) | 1.00 (0.81-1.21) | 248 |
June | 1.17 (0.43-3.63) | 3.37 (2.75-3.68) | 1.02 (0.83-1.25) | 370 |
July | 1.23 (0.41-4.30) | 3.39 (2.79-3.70) | 1.03 (0.83-1.30) | 452 |
August | 1.24 (0.41-3.44) | 3.29 (2.43-3.69) | 1.02 (0.84-1.29) | 586 |
September | 1.26 (0.45-3.69) | 3.00 (2.37-3.50) | 1.03 (0.82-1.28) | 551 |
October | 1.30 (0.41-4.08) | 3.00 (2.33-3.56) | 1.04 (0.85-1.31) | 610 |
November | 1.30 (0.38-3.86) | 3.05 (2.39-3.58) | 1.04 (0.84-1.32) | 576 |
December | 1.34 (0.46-4.10) | 3.01 (2.36-3.62) | 0.99 (0.81-1.21) | 735 |
All | 1.34 (0.43-4.27) | 3.13 (2.44-3.66) | 1.02 (0.83-1.27) | 6,343 |
Range represents 2.5th to 97.5th percentiles.
Abbreviations: FT3, free triiodothyronine; FT4, free thyroxine; TSH, thyrotropin.