Table 1.
Characteristics of the subjects with hypothyroidism on thyroxine medication
| Follow-Up TFTa | |||||
|---|---|---|---|---|---|
| Total | Under-replace | Euthyroid | Over-replace | P-value | |
| Total | 5749 (100) | 1694 (29.5) | 3558 (61.9) | 497 (8.6) | |
| Age | 62.1 (13.29) | 62.25 (13.76) | 62.22 (12.99) | 60.79 (13.69) | 0.07 |
| Gender | < 0.001 | ||||
| Female | 4539 (79) | 1273 (28) | 2865 (63.1) | 401 (8.8) | |
| Male | 1210 (21) | 421 (34.8) | 693 (57.3) | 96 (7.9) | |
| Ethnicity | < 0.001 | ||||
| Chinese | 4583 (79.7) | 1301 (28.4) | 2906 (63.4) | 376 (8.2) | |
| Malay | 365 (6.3) | 130 (35.6) | 190 (52.1) | 45 (12.3) | |
| Indian | 572 (9.9) | 199 (34.8) | 321 (56.1) | 52 (9.1) | |
| Other | 229 (4) | 64 (27.9) | 141 (61.6) | 24 (10.5) | |
| BMIb | < 0.001 | ||||
| Underweight | 156 (4.6) | 58 (37.2) | 90 (57.7) | 8 (5.1) | |
| Normal | 1013 (29.8) | 270 (26.7) | 653 (64.5) | 90 (8.9) | |
| Overweight | 1323 (38.9) | 368 (27.8) | 836 (63.2) | 119 (9) | |
| Obese | 909 (26.7) | 315 (34.7) | 517 (56.9) | 77 (8.5) | |
aThyroid function tests
bBMI Body Mass Index