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Table 1 Sample distribution and results of 4242 salt samples screened for iodine content by rapid test kit (RTK) classified by the five geographical provinces and the 13 administrative regions in Saudi Arabia, 2012

From: Assessment of household use of iodized salt and adequacy of salt iodization: a cross-sectional National Study in Saudi Arabia

Locality No. of Clusters No. of Salt Samples % Iodized salt by RTK (95% CI)
Regions in Central Province
- Riyadh 24 718 81.1 (78.0-83.8)
- Qaseem 6 214 75.2 (68.9-80.9)
Total 30 932 79.7 (77.0-82.2)
Regions in Western Province
- Makkah 22 691 82.3 (79.2-85.1)
- Maddinah 8 277 76.2 (70.7-81.1)
Total 30 968 80.6 (77.9-83.0)
Regions in Eastern Province
Total 30 683 63.8 (60.1-67.4)
Regions in Northern Province
- Hail 8 294 31.3 (26.0-36.9)
- Northern Borders 5 186 57.5 (50.1-64.7)
- Tabouk 11 354 66.7 (61.5-71.6)
- Jouf 6 208 60.6 (53.6-67.3)
Total 30 1042 53.8 (50.8-56.9)
Regions in Southern Province
- Jizan 11 224 66.5 (59.9-72.7)
- Asseer 13 173 61.8 (54.2-69.1)
- Baha 3 117 53.0 (43.5-62.3)
- Najran 3 103 74.8 (65.2-82.8)
Total 30 617 64.0 (60.1-67.8)
National 150 4242 68.7 (67.3-70.1)
69.8 (69.4-71.2)a
  1. Abbreviations: RTK rapid test kit; CI confidence interval
  2. aAdjusted national estimate to account for regional population weights
  3. There was a significant difference in iodized salt samples among geographical provinces (χ2 = 237.1; df = 4; P < 0.001)