Table 6.
Monthly family income and different variables (N = 1,295).
| Variables | Monthly family income (Yuan) | Chi-square value | P-value | |||
|---|---|---|---|---|---|---|
| <6,000 | ≥6,000 and <12,000 | ≥12,000 | ||||
| Frequency of tooth brushing | ||||||
| ≥Twice a day | 388 (49.5%) | 202 (58.2%) | 105 (64%) | 15.499 | 0.004* | |
| =Once a day | 352 (44.9%) | 129 (37.2%) | 53 (32.3%) | |||
| <Once a day | 44 (5.6%) | 16 (4.6%) | 6 (3.7%) | |||
| Frequency of desserts | ||||||
| Occasionally or never | 618 (78.8%) | 270 (77.8%) | 133 (81.1%) | 0.722 | 0.697 | |
| ≥Once a day | 166 (21.2%) | 77 (22.2%) | 31 (18.9%) | |||
| Frequency of sweet drinks | ||||||
| Occasionally or never | 747 (95.3%) | 316 (91.1%) | 149 (90.9%) | 9.467 | 0.009* | |
| ≥Once a day | 37 (4.7%) | 31 (8.9%) | 15 (9.1%) | |||
| Frequency of candy/chocolate | ||||||
| Occasionally or never | 685 (87.4%) | 279 (80.4%) | 140 (85.4%) | 9.293 | 0.01* | |
| ≥Once a day | 99 (12.6%) | 68 (19.6%) | 24 (14.6%) | |||
| Snacks before bed without toothbrushing | ||||||
| Occasionally or never | 721 (92%) | 324 (93.4%) | 157 (95.7%) | 3.106 | 0.212 | |
| Often | 63 (8%) | 23 (6.6%) | 7 (4.3%) | |||
| Application of fluoride varnish | ||||||
| No | 535 (68.2%) | 205 (59.1%) | 86 (52.4%) | 19.203 | <0.0001* | |
| Yes | 249 (31.8%) | 142 (40.9%) | 78 (47.6%) | |||
| Know the 6 year molars | ||||||
| Yes | 224 (28.6%) | 114 (32.9%) | 47 (28.7%) | 2.214 | 0.331 | |
| No | 560 (71.4%) | 233 (67.1%) | 117 (71.3%) | |||
| Decayed primary teeth need no treatment | ||||||
| Disagree | 582 (74.2%) | 303 (87.3%) | 147 (89.6%) | 36.918 | <0.0001* | |
| Agree/unclear | 202 (25.8%) | 44 (12.7%) | 17 (10.4%) | |||
| Consuming too much sugar correlates to increased caries risk | ||||||
| Agree | 760 (96.9%) | 340 (98%) | 162 (98.8%) | 2.391 | 0.303 | |
| Disagree/unclear | 24 (3.1%) | 7 (2%) | 2 (1.2%) | |||
*
Statistically significant at P < 0.05.