| | Variables | Frequency | Percent | Crude OR (95% CI) | Adjusted OR (95% CI) |
| | Residence area | | Rural | 275 | 77.0% | 1 | 1 | | Urban | 82 | 23.0% | 3.43 (2.03, 5.80) | 2.77 (1.24, 6.20) | | Educational level of mother | | Cannot read and write | 240 | 67.2% | 1 | 1 | | Can read and write | 55 | 15.4% | 3.55 (1.71, 7.38) | 1.37 (0.47, 3.97) | | Grades 1-4 | 12 | 3.4% | 2.09 (0.88, 4.96) | 1.11 (0.39, 3.13) | | Grades 5-8 | 8 | 2.2% | 0.72 (0.17, 3.16) | 0.28 (0.05, 1.45) | | Grades 9-12 | 4 | 1.1% | 2.17 (0.46, 10.16) | 1.04 (0.90, 5.68) | | Graduated | 38 | 10.6% | 2.89 (1.94, 5.21) | 1 | | Average monthly income | | | 133 | 37.3% | 1 | 1 | | 101_500 | 110 | 30.8% | 2.60 (1.42, 4.73) | 1.08 (0.47, 2.47). | | 501_ 999 | 46 | 12.9% | 2.09 (1.31, 3.87) | 0.91 (0.40, 2.10) | | | 68 | 19.0% | 1.92 (0.90, 4.11) | 1.03 (0.41, 2.58) | | Container of salt | | | | | | Container with cover | 317 | 88.8% | 3.81 (1.04,4.30) | 2.60 (1.83, 3.50) | | Container without cover | 40 | 11.2% | 1 | 1 | | Washing salt before use | | Yes | 71 | 19.9% | 1 | 1 | | No | 286 | 80.1% | 2.32 (1.32, 4.10) | 0.20 (0.08, 0.36) | | Expose to sunlight? | | Yes | 10 | 2.8% | 1 | 1 | | No | 347 | 97.2% | 3.19 (1.89, 6.51) | 1.75 (0.89, 3.21) |
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