Table 1.
Characteristics of the Study Population
| Total (n=436) |
Participants with <12 Years of Education (n=106) | Participants with ≥12 Years of Education (n=330) |
|
|---|---|---|---|
| Sex, | |||
| Male (n, %) | 65.1% (284) | 13.8% (60) | 51.3% (224) |
| Age (y) | 58.84±3.01 | 59.84±2.47 | 58.39±2.78 |
| BMI (kg/m2) | 24.78±3.68 | 26.30±3.91 | 24.81±3.70* |
| SBP (mmHg) | 132.18±12.34 | 136.75±16.67 | 130.67±11.05* |
| DBP (mmHg) | 81.07±9.84 | 85.63±10.25 | 81.21±9.71* |
| Alcohol consumption, % (n) | |||
| Nondrinkers | 23.3% (72) | 54.8% (58) | 42.7% (141) |
| Drinkers | 76.7% (237) | 45.2% (48) | 57.3% (189) |
| Cigarette smoking, % (n) | |||
| Nonsmokers | 86.5% (377) | 64.2% (34) | 69.9% (93) |
| Smokers | 13.5% (59) | 35.5% (19) | 30.1% (40) |
| Amalgam filling, % (n) | |||
| Yes | 68.1% (297) | 53.8% (57) | 72.7% (240) |
| No | 31.9% (139) | 46.2% (49) | 27.4% (90) |
| Frequency of seafood (shellfish, shrimp, squid, and fish) consumption, % (n) | |||
| 0–1 times/month, | 41.1% (179) | 52.0% (55) | 36.4% (120) |
| 1–2 days/wk | 43.8% (191) | 36.7% (39) | 45.5% (150) |
| More than 3 days/wk | 15.1% (66) | 11.3% (12) | 18.2% (60) |
| Blood mercury (µg/L)a | 6.31(0.83–27.61) | 7.03 (0.83–27.61) | 6.29 (0.99–18.58)* |
| Cognitive score (%) | |||
| MoCA score ≥26 | 60.3% (263) | 40.6% (43) | 66.7% (220) |
| MoCA score <26 | 39.7% (173) | 59.4% (63) | 37.6% (110) |
Notes: aGeometric mean of blood mercury and range. *Significant difference from subjects with <12 years of education, P<0.05.
Abbreviations: BMI, body mass index; SBP, systolic blood pressure; DBP, diastolic blood pressure; MoCA, Montreal Cognitive Assessment.