Table 1 Mean blood lead level according to socioeconomic status and oral hygiene behavior in school-age children
N | Pb (μg/dl) Mean ± SD | |
|---|---|---|
Total participants | 137 | 1.25 ± 0.43 |
Grade | ||
Elementary | 100 | 1.35 ± 0.43 |
Middle | 37 | 0.99 ± 0.32 |
Gender | ||
Male | 68 | 1.33 ± 0.43 |
Female | 69 | 1.19 ± 0.43 |
Family income (×10,000 won/month)a | ||
< 200 | 17 | 1.18 ± 0.38 |
200-399 | 47 | 1.20 ± 0.36 |
400-599 | 46 | 1.31 ± 0.46 |
> 600 | 23 | 1.25 ± 0.52 |
Level of parent’s educationa | ||
≤ High school | 61 | 1.29 ± 0.39 |
College/university | 70 | 1.22 ± 0.48 |
Graduate school | 5 | 1.22 ± 0.17 |
Father’s occupation | ||
Professional | 17 | 1.18 ± 0.38 |
White collar/service | 47 | 1.20 ± 0.36 |
Blue collar | 46 | 1.31 ± 0.46 |
Unemployed | 23 | 1.25 ± 0.52 |
Mother’s occupation | ||
Professional | 24 | 1.31 ± 0.50 |
White collar/service | 39 | 1.23 ± 0.42 |
Blue collar | 11 | 1.21 ± 0.34 |
Unemployed | 63 | 1.23 ± 0.40 |
Frequency of tooth cleaning | ||
≤ once a day | 3 | 1.20 ± 0.12 |
2-3 times/day | 101 | 1.29 ± 0.44 |
> 4 times/day | 33 | 1.17 ± 0.40 |
Intake of sugar-containing sweets | ||
< Once a day | 23 | 1.26 ± 0.40 |
Once a day | 71 | 1.25 ± 0.44 |
2-3 times/day | 43 | 1.27 ± 0.45 |
Dental treatment demand (1 year) | ||
Yes | 80 | 1.27 ± 0.45 |
No | 56 | 1.23 ± 0.41 |
History of decayed teeth | ||
Yes | 63 | 1.31 ± 0.40 |
No | 74 | 1.21 ± 0.46 |
CPI index | ||
0 | 34 | 1.19 ± 0.39 |
≥ 1 | 92 | 1.29 ± 0.44 |
Gingival index | ||
≤ 1 | 39 | 1.20 ± 0.41 |
2-3 | 98 | 1.28 ± 0.44 |
Plaque index | ||
≤ 2 | 56 | 1.15 ± 0.46 |
3 | 81 | 1.33 ± 0.40 |