| | Variables | Frequency | Percent | Crude OR (95% CI) | Adjusted OR (95% CI) |
| | Residence area | | Rural | 275 | 77.0% | 1 | 1 | | Urban | 82 | 23.0% | 3.27 (1.39, 7.93) | 2.56 (1.00, 4.71) | | Education of household | | Cannot read and write | 240 | 67.2% | 1 | 1 | | Can read and write | 55 | 15.4% | 13.10 (5.25, 37.18) | 1.02 (1.37, 7.60) | | Grades 1-4 | 12 | 3.4% | 4.74 (1.61, 14.00) | 1.27 (1.71, 9.52) | | Grades 5-8 | 8 | 2.2% | 1.32 (2.87, 6.10) | 1.21 (2.79, 5.26) | | Grades 9-12 | 4 | 1.1% | 1.98 (3.10, 12.67) | 1 | | Graduated | 38 | 10.6% | 3.74 (2.91, 9.65) | 1 | | Household jobs | | Farmer | 204 | 57.1% | 1 | 1 | | Business man | 61 | 17.1% | 3.53 (1.74, 7.16) | 0.86 (0.34, 2.19) | | Employed | 29 | 8.1% | 0.50 (0.44, 2.26) | 0.93 (0.300, 2.88) | | Student | 24 | 6.7% | 0.30 (0.94, 1.70) | | | Others | 39 | 19% | 2.01 (0.72, 5.70) | | | Average monthly income | | | 133 | 37.3% | 1 | 1 | | 101_500 | 110 | 30.8% | 7.67 (3.88, 15.11) | 0.63 (0.22, 1.84) | | 501_ 999 | 46 | 12.9% | 7.26 (3.61, 14.60) | 0.58 (0.19, 1.76) | | | 68 | 19.0% | 4.21 (1.86, 9.51) | 0.60 (0.66, 2.05) | | Salt container | | Container with cover | 317 | 88.8% | 0.31 (0.14, 0.70) | 1.52 (0.66, 3.50) | | Container without cover | 40 | 11.2% | 1 | 1 | | Expose to sunlight? | | Yes | 10 | 2.8% | 1 | 1 | | No | 347 | 97.2% | 2.19 (1.89, 6.51) | 1.35 (0.69, 3.01) |
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