Table 3 |
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|
Characteristics of the study population (N = 396,049) according to the categories of exposure, Taiwan, 2001–2003. |
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| Characteristic |
TTHMs (0–4 μg/L) Reference N (%) |
TTHMs (5–9 μg/L) Low N (%) |
TTHMs (10–19 μg/L) Medium N (%) |
TTHMs (20+ μg/L) High N (%) |
Total N (%) |
|
|
|||||
| Total |
181,985 (100%) |
55,950 (100%) |
82,797 (100%) |
75,317 (100%) |
396,049 (100%) |
| Gender of infant |
|||||
| Male |
95,027 (52.2%) |
29,128 (52.1%) |
43,155 (52.1%) |
39,413 (52.3%) |
206,723(52.2%) |
| Female |
86,958 (47.8%) |
26,822 (47.9%) |
39,642 (47.9%) |
35,904 (47.7%) |
189,326 (47.8%) |
| Maternal age |
|||||
| <20 years |
6,419 (3.5%) |
1,838 (3.3%) |
3,499 (4.2%) |
3,461 (4.6%) |
15,217 (3.8%) |
| 20–34 |
156,087 (85.8%) |
46,871 (83.8%) |
72,402 (87.4%) |
65,947 (87.6%) |
341,307 (86.2%) |
| 35- |
19,476 (10.7%) |
7,241 (12.9%) |
6,893 (8.3%) |
5,909 (7.8%) |
39,519 (10.0%) |
| Maternal diabetes mellitus |
|||||
| Yes |
418 (0.2%) |
189 (0.3%) |
179 (0.2%) |
144 (0.2%) |
930 (0.2%) |
| No |
181,567 (99.8%) |
55,761 (99.7%) |
82,618 (99.8%) |
75,173 (99.8%) |
395,119 (99.8%) |
| Plurality |
|||||
| Singleton |
176,791 (97.1%) |
54,383 (97.2%) |
80,755 (97.5%) |
73,442 (97.5%) |
385,371 (97.3%) |
| Multiple birth |
5,194 (2.9%) |
1,567 (2.8 %) |
2,042 (2.5%) |
1,875 (2.5%) |
10,678 (2.7%) |
| Population density (no of people/km2)* |
|||||
| <1000 |
29,881 (16.4%) |
6,697 (12.0%) |
20,387 (24.6%) |
26,392 (35.2%) |
83,357 (21.1%) |
| 1000–5000 |
71,005 (39.0%) |
27,257 (48.7%) |
23,569 (28.5%) |
31,823 (42.5%) |
153,654 (38.8%) |
| >5000 |
81,099 (44.6%) |
21,996 (39.3%) |
38,841 (46.9%) |
16,738 (22.3%) |
158,674 (40.1%) |
|
|
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|
Hwang et al. Environmental Health 2008 7:23 doi:10.1186/1476-069X-7-23 |
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