Table 3.
Characteristics of Cluster A’s, Cluster B’s and Cluster C’s participants
| Characteristic | Total (n = 2,701) | Cluster A (n = 837) | Cluster B (n = 1264) | Cluster C (n = 600) | Statistic | P |
|---|---|---|---|---|---|---|
| Age, years, Mean ± SD | 14.63 ± 1.96 | 14.74 ± 1.97 | 14.66 ± 1.94 | 14.44 ± 1.95 | F = 4.412 | 0.012 |
| Gender, n (%) | χ2 = 7.985 | 0.018 | ||||
| Male | 1425 (52.76) | 438 (52.33) | 641 (50.71) | 346 (57.67) | ||
| Female | 1276 (47.24) | 399 (47.67) | 623 (49.29) | 254 (42.33) | ||
| Geographic regiona, n (%) | χ2 = 110.382 | < 0.001 | ||||
| Eastern China | 631 (23.36) | 148 (17.68) | 364 (28.80) | 119 (19.83) | ||
| Central China | 712 (26.36) | 273 (32.62) | 254 (20.09) | 185 (30.83) | ||
| Western China | 795 (29.43) | 194 (23.18) | 391 (30.93) | 210 (35.00) | ||
| Northeastern China | 563 (20.84) | 222 (26.52) | 255 (20.17) | 86 (14.33) | ||
| Residential areas, n (%) | χ2 = 2.422 | 0.298 | ||||
| Urban | 1003 (37.13) | 293 (35.01) | 484 (38.29) | 226 (37.67) | ||
| Rural | 1698 (62.87) | 544 (64.99) | 780 (61.71) | 374 (62.33) | ||
| Maternal education level, n (%) | χ2 = 54.051 | < 0.001 | ||||
| Below primary school | 356 (13.18) | 126 (15.05) | 132 (10.44) | 98 (16.33) | ||
| Primary school | 545 (20.18) | 185 (22.10) | 225 (17.80) | 135 (22.50) | ||
| Middle school | 1077 (39.87) | 353 (42.17) | 487 (38.53) | 237 (39.50) | ||
| High school and above | 723 (26.77) | 173 (20.67) | 420 (33.23) | 130 (21.67) | ||
| Smoking, n (%) | 95 (3.52) | 32 (3.82) | 40 (3.16) | 23 (3.83) | χ2 = 0.871 | 0.647 |
| Alcohol consumption, n (%) | 390 (14.44) | 74 (8.84) | 196 (15.51) | 120 (20.00) | χ2 = 37.415 | < 0.001 |
| Waist-to-hip ratio, Mean ± SD | 0.82 ± 0.09 | 0.82 ± 0.08 | 0.82 ± 0.10 | 0.83 ± 0.09 | F = 1.337 | 0.263 |
| SBP, mmHg, Mean ± SD | 106.05 ± 11.49 | 106.55 ± 11.26 | 105.88 ± 11.20 | 105.73 ± 12.34 | F = 1.158 | 0.314 |
| DBP, mmHg, Mean ± SD | 69.53 ± 8.52 | 69.79 ± 8.58 | 69.51 ± 8.21 | 69.23 ± 9.06 | F = 0.776 | 0.460 |
Cluster A: high diet knowledge level; Cluster B: medium diet knowledge level; Cluster C: low diet knowledge level
SD Standard deviation, SBP Systolic blood pressure, DBP Diastolic blood pressure
aEastern China includes: the city of Beijing and Shanghai, the province of Jiangsu, Shandong and Zhejiang; Central China includes: the province of Henan, Hubei and Hunan; Western China includes: the province of Guizhou, Guangxi, Shanxi and Yunnan, the city of Chongqing; Northeastern China includes: the province of Liaoning and Heilongjiang