Table 1.
Demographic characteristics and diet according to prevalence of hyperthyroidism (n 65 981), Adventist Health Study-2
| Prevalent hyperthyroidism | |||||
|---|---|---|---|---|---|
| No (n 65 378; 99·1 %) | Yes (n 603; 0·9 %) | ||||
| Mean or % | sd | Mean or % | sd | P value* | |
| Age (years) | 56·7 | 13·7 | 61·0 | 13·7 | <0·0001 |
| BMI (kg/m2) | 27·2 | 5·9 | 28·3 | 6·4 | <0·0001 |
| Gender (% female) | 63·1 | – | 84·7 | – | <0·0001 |
| Race (% non-Black) | 75·8 | – | 73·1 | – | 0·13 |
| Income (%) | <0·0001 | ||||
| ≤$US 10 000 | 19·8 | – | 30·2 | – | |
| $US 11 000–20 000 | 19·8 | – | 26·2 | – | |
| $US 21 000–30 000 | 16·8 | – | 13·9 | – | |
| >$US 30 000 | 43·7 | – | 29·7 | – | |
| Education (%) | <0·0001 | ||||
| ≤High school | 18·6 | – | 27·0 | – | |
| Some college | 39·6 | – | 42·1 | – | |
| ≥College | 41·8 | – | 30·9 | – | |
| Continent of residence during early life (%) | 0·73 | ||||
| USA or Canada | 86·4 | – | 86·4 | – | |
| Asia or Australia | 2·5 | – | 2·7 | – | |
| Other | 11·1 | – | 10·9 | – | |
| CVD (%) | 7·5 | – | 16·9 | – | <0·0001 |
| Salt use (%) | 0·16 | ||||
| ≤1 time/week | 34·8 | – | 38·3 | – | |
| 2–6 times/week | 43·2 | – | 39·8 | – | |
| ≥1 time/d | 22·0 | – | 21·9 | – | |
| Dietary pattern (%) | <0·0001 | ||||
| Vegan | 8·2 | – | 4·8 | – | |
| Lacto-ovo vegetarian | 27·9 | – | 21·2 | – | |
| Semi-vegetarian | 5·6 | – | 5·1 | – | |
| Pesco vegetarian | 9·7 | – | 9·0 | – | |
| Omnivore | 48·6 | – | 59·9 | – | |
*
Compared by the independent t test (continuous variables) or the χ 2 test (categorical variables).