Sources of drinking water among 257 cases of aplastic anemia and 1087 controls according to region; phase 2 data only
. | Cases . | . | Controls . | . | Relatie risk estimate . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| Source . | No. . | % . | No. . | % . | Crude . | Multivariate*(95% CI) . | |||
| Bangkok; 77 cases, 317 controls | |||||||||
| Bottled/distilled water only | 25 | 32 | 102 | 32 | 1.0† | 1.0† | |||
| Other sources§ | 52 | 68 | 215 | 68 | 1.0 | 1.0 (0.6-1.8) | |||
| Well water | 2 | 3 | 1 | 0.3 | — | — | |||
| Tap water | 10 | 13 | 55 | 17 | 0.7 | 0.8 (0.3-1.7) | |||
| Rain water | 3 | 4 | 24 | 8 | 0.5 | 0.5 (0.1-1.9) | |||
| Boiled water | 28 | 36 | 82 | 26 | 1.4 | 1.6 (0.8-3.2) | |||
| Other | 5 | 6 | 13 | 4 | 1.6 | 1.7 (0.5-5.2) | |||
| Khonkaen; 180 cases, 770 controls | |||||||||
| Bottled/distilled water only | 9 | 5 | 115 | 15 | 1.0† | ||||
| Other sources‡ | 171 | 95 | 655 | 85 | 3.3 | 2.8 (1.3-5.9) | |||
| Well water | 18 | 10 | 42 | 5 | 5.5 | 3.5 (1.4-9.2) | |||
| Nonartesian water only | 13 | 7 | 26 | 3 | 6.4 | 3.7 (1.3-11) | |||
| Tap water | 8 | 4 | 25 | 3 | 4.1 | 3.8 (1.2-12) | |||
| Rain water | 141 | 78 | 563 | 73 | 3.2 | 2.6 (1.2-5.6) | |||
| Boiled water | 15 | 8 | 50 | 6 | 3.8 | 2.9 (1.1-7.7) | |||
| Other | 2 | 1 | 16 | 2 | — | — | |||
. | Cases . | . | Controls . | . | Relatie risk estimate . | . | |||
|---|---|---|---|---|---|---|---|---|---|
| Source . | No. . | % . | No. . | % . | Crude . | Multivariate*(95% CI) . | |||
| Bangkok; 77 cases, 317 controls | |||||||||
| Bottled/distilled water only | 25 | 32 | 102 | 32 | 1.0† | 1.0† | |||
| Other sources§ | 52 | 68 | 215 | 68 | 1.0 | 1.0 (0.6-1.8) | |||
| Well water | 2 | 3 | 1 | 0.3 | — | — | |||
| Tap water | 10 | 13 | 55 | 17 | 0.7 | 0.8 (0.3-1.7) | |||
| Rain water | 3 | 4 | 24 | 8 | 0.5 | 0.5 (0.1-1.9) | |||
| Boiled water | 28 | 36 | 82 | 26 | 1.4 | 1.6 (0.8-3.2) | |||
| Other | 5 | 6 | 13 | 4 | 1.6 | 1.7 (0.5-5.2) | |||
| Khonkaen; 180 cases, 770 controls | |||||||||
| Bottled/distilled water only | 9 | 5 | 115 | 15 | 1.0† | ||||
| Other sources‡ | 171 | 95 | 655 | 85 | 3.3 | 2.8 (1.3-5.9) | |||
| Well water | 18 | 10 | 42 | 5 | 5.5 | 3.5 (1.4-9.2) | |||
| Nonartesian water only | 13 | 7 | 26 | 3 | 6.4 | 3.7 (1.3-11) | |||
| Tap water | 8 | 4 | 25 | 3 | 4.1 | 3.8 (1.2-12) | |||
| Rain water | 141 | 78 | 563 | 73 | 3.2 | 2.6 (1.2-5.6) | |||
| Boiled water | 15 | 8 | 50 | 6 | 3.8 | 2.9 (1.1-7.7) | |||
| Other | 2 | 1 | 16 | 2 | — | — | |||
— indicates not calculated.
The following factors were included in the models: Bangkok: age, sex, year of interview (continuous term), consumption of nonbottled water; Khonkaen: age, sex, residential location, year of interview (continuous term), pesticide use, exposure to ducks, animal fertilizer use, consumption of nonbottled water. Statistically significant estimates are italicized
Reference category
Categories not mutually exclusive