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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)