Table 1.
The characteristics of participants aged from 18 to 60.
| Characteristics | Total | Northern | Southern |
|---|---|---|---|
| N | 595 (100%) | 324 (54.5%) | 271 (45.5%) |
| Age group (year) | |||
| 18–39 | 291 (48.9%) | 170 (52.5%) | 121 (44.6%) |
| 40–60 | 304 (51.1%) | 154 (47.5%) | 150 (55.4%) |
| Gender | |||
| Male | 285 (47.9%) | 154 (47.5%) | 131 (48.3%) |
| Female | 310 (52.1%) | 170 (52.5%) | 140 (51.7%) |
| Urban or Rural | |||
| Urban | 304 (51.1%) | 164 (50.6%) | 140 (51.7%) |
| Rural | 291 (48.9%) | 160 (49.4%) | 131 (48.3%) |
| Education level | |||
| Primary school or below | 34 (5.7%) | 11 (3.4%) | 23 (8.5%) |
| Middle school | 186 (31.3%) | 130 (40.1%) | 56 (20.7%) |
| High school and above | 375 (63%) | 183 (56.5%) | 192 (70.8%) |
| Household income level * | |||
| Low | 9 (1.5%) | 8 (2.5%) | 1 (0.4%) |
| Medium | 124 (20.8%) | 110 (34.0%) | 14 (5.2%) |
| High | 204 (34.3%) | 56 (17.2%) | 148 (54.5%) |
| Unclear | 258 (43.4%) | 150 (46.3%) | 108 (39.9%) |
| BMI (Kg/m2) | |||
| 18.5< | 13 (2.2%) | 4 (1.2%) | 9 (3.3%) |
| 18.5–23.9 | 300 (50.4%) | 143 (44.1%) | 157 (57.9%) |
| ≥24 | 282 (47.4%) | 177 (54.7%) | 105 (38.8%) |
| The number of 24 h recalls | |||
| 23 | 4 (0.7%) | 1 (0.3%) | 3 (1.1%) |
| 24 | 4 (0.7%) | 4 (1.2%) | 0 (0%) |
| 25 | 5 (0.8%) | 1 (0.3%) | 4 (1.5%) |
| 26 | 12 (2.0%) | 5 (1.5%) | 7 (2.6%) |
| 27 | 56 (9.4%) | 29 (9.0%) | 27 (10.0%) |
| 28 | 514 (86.4%) | 284 (87.7%) | 230 (84.8%) |
*—Household Income Level: low (<20,000 RMB), medium (20,000–50,000 RMB), high (≥50,000 RMB), and Unclear (unknown or refused to answer); BMI—Body Mass Index.