Table 1 Distribution of median and interquartiles ranges of iodine concentration of household salt collected in 12 Moroccan regions

Region 1: Tanger-Tétouan-Al Hoceima

799 124

3 556 729

16

2

4.7 (3.2–14.5)*

Region 2: L'Oriental

494 530

2 314 346

10

2

2.6 (1.9–3.4)

Region 3: Fès-Meknès

919 497

4 236 892

41

4

2.9 (2.4–3.4)

Region 4: Rabat-Salé-Kénitra

1 015 107

4 580 866

42

4

2.8 (2.1–3.8)

Region 5: Béni Mellal-Khénifra

520 174

2 520 776

4

1

3.6 (2.8–6.5)

Region 6: Grand Casablanca-Settat

1 559 404

6 861 739

18

1

2.5 (2.0–3.3)

Region 7: Marrakech-Safi

928 120

4 520 569

13

1

2.9 (1.8–3.3)

Region 8: Drâa-Tafilalet

277 998

1 635 008

12

4

2.8 (2.4–3.6)

Region 9: Sous-Massa

601 511

2 676 847

11

2

2.4 (2.4–3.2)

Region 10: Guelmim-Oued Noun

90 202

433 757

7

8

2.6 (2.4–3.7)

Region 11: Laâyoune-Sakia El Hamra

78 754

367 758

3

4

4.2 (2.6–4.2)

Region 12: Dakhla-Oued Eddahab

29 385

142 955

1

3

2.9 (2.9–2.9)

Total

7 313 806

33 848 242

178

2

2.9 (2.4–3.7)