Table 2.
Baseline Characteristics According to Quartile Categories of Blood Folate Level, as Reported in the Korean National Health and Nutrition Examination Survey 2016-2018
| Quartile Blood Folate Level (ng/mL) | |||||
|---|---|---|---|---|---|
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | P for Trend | |
| Male | 77.0 (1.4) | 55.9 (1.5) | 43.9 (1.7) | 32.9 (1.1) | <0.001* |
| Age ≥ 60 years | 32.1 (1.9) | 27.9 (1.8) | 30.0 (1.4) | 36.8 (1.5) | <0.001* |
| Hypertension | 0.009* | ||||
| Normal | 31.7 (1.7) | 33.7 (1.5) | 39.1 (1.7) | 38.1 (1.5) | |
| Pre hypertension | 26.3 (2.1) | 29.4 (1.7) | 24.9 (1.2) | 25.3 (1.0) | |
| Hypertension | 42.0 (1.7) | 36.9 (1.5) | 35.9 (1.5) | 36.7 (1.3) | |
| Diabetes | 0.021* | ||||
| Normal | 52.5 (1.6) | 53.9 (1.7) | 54.3 (1.7) | 59.8 (1.4) | |
| Pre diabetes | 30.9 (1.4) | 31.3 (1.6) | 30.0 (1.5) | 26.1 (1.0) | |
| Diabetes | 16.6 (1.4) | 14.8 (1.1) | 15.7 (1.0) | 14.1 (1.0) | |
| Hypercholesterolemia | 23.4 (1.8) | 24.2 (1.1) | 24.9 (1.1) | 30.8 (1.1) | 0.001* |
| Smoking | <0.001* | ||||
| Never | 30.2 (1.9) | 49.4 (1.6) | 61.5 (1.6) | 71.1 (1.2) | |
| Former | 29.7 (1.5) | 27.9 (1.3) | 24.4 (1.3) | 19.8 (1.0) | |
| Current | 40.2 (2.0) | 22.7 (1.6) | 14.1 (1.1) | 9.1 (0.8) | |
Data are expressed as weighted frequency (%) with standard errors.
*
P < 0.05.