| Consumption of |
| Urinary iodine level <150 μg/L | Urinary iodine level ≥150 μg/L | Total |
| Sea water fish | No | 3 (100%) | 0 | 3 |
| Yes | 107 (73%) | 38 (27%) | 141 | |
| Prawn | No | 25 (69.4%) | 11 (30.6%) | 36 |
| Yes | 103 (95.4%) | 5 (4.6%) | 108 | |
| Crab | No | 37 (71.2%) | 15 (28.8%) | 52 |
| Yes | 69 (75.0%) | 23 (25.0%) | 92 | |
| Squid | No | 44 (70.9%) | 18 (29.1%) | 62 |
| Yes | 62 (75.6%) | 20 (24.4%) | 82 | |
| Calm/Mussel | No | 95 (72.5%) | 36 (27.5%) | 131 |
| Yes | 11 (84.6%) | 2 (15.4%) | 13 | |
| Fish sauce | No | 34 (69.4%) | 15 (30.6%) | 49 |
| Yes | 72 (75.8%) | 23 (24.2%) | 95 | |
| Fish paste | No | 19 (79.2%) | 5 (20.8%) | 24 |
| Yes | 87 (72.5%) | 33 (27.5%) | 120 | |
| Dried fish | No | 16 (88.9%) | 2 (11.1%) | 18 |
| Yes | 90 (71.4%) | 36 (28.6%) | 126 |