Table 2 Iodine content of salt tested by iodometric titration method in a representative salt sample (n= 775) positive for iodine content by rapid test kit (RTK) at different geographical provinces and national level in Saudi Arabia, 2012
Geographical areas | No. of Salt Samples | % of salt samples at various iodine concentrations (ppm) | Mean (SD) | Median (IQR) | ||
|---|---|---|---|---|---|---|
<15 | 15-40 | >40 | ||||
Central province | 172 | 7.0 | 37.8 | 55.2 | 42.76 (21.30) | 43.5 (27.0-54.0) |
Western province | 182 | 1.6 | 14.3 | 84.1 | 54.32 (16.88) | 53.0 (44.0-65.0) |
Eastern province | 142 | 12.7 | 20.4 | 66.9 | 51.33 (27.91) | 54.0 (29.0-69.0) |
Northern province | 154 | 1.3 | 25.6 | 73.1 | 52.10 (21.05) | 52.0 (38.0-64.0) |
Southern province | 125 | 0.0 | 24.0 | 76.0 | 52.44 (18.98) | 51.0 (41.0-64.0) |
National | 775 | 4.8 | 24.5 | 70.7 | 50.40 (21.80) | 51.0 (37.0-63.0) |