Table 1.
Characteristics of patients with spontaneous hypothyroidism (number of patients = 112)
| Characteristic | Mean (sd) | Percentage |
|---|---|---|
| Age (yr) | 46 (15) | |
| Gender | ||
| Female | 73 | |
| Male | 27 | |
| Height (m) | 1.68 (0.10) | |
| Weight (kg) | 73 (16) | |
| BMI | 26 (5) | |
| Menopausal status | ||
| Premenopausal | 43 | |
| Postmenopausal | 30 | |
| Not applicable | 27 | |
| TSH (mIU/liter) | 51 (73) | |
| FT4 (ng/dl) | 0.76 (0.35) | |
| Serum creatinine (mg/dl) | ||
| All ages | 0.99 (0.27) | |
| <35 yr | 0.91 (0.22) | |
| 35–49 yr | 0.94 (0.22) | |
| 50–64 yr | 1.05 (0.28) | |
| >64 yr | 1.21 (0.36) | |
| GFR (ml/min · 1.73 m2) | ||
| All ages | 83 (30) | |
| <35 yr | 99 (36) | |
| 35–49 yr | 87 (27) | |
| 50–64 yr | 71 (18) | |
| >64 yr | 58 (15) | |
| Type of hypothyroidism | ||
| Overt | 46 | |
| Subclinical | 54 | |
| Cause of hypothyroidism | ||
| Hashimoto’s hypothyroidism | 62 | |
| Surgery | 21 | |
| Radioiodine therapy | 11 | |
| External beam radiotherapy | 6 | |
| Presence of elevated thyroid peroxidase antibodies | ||
| Yes | 37 | |
| No | 35 | |
| Not determined | 28 |