Comparing the Quality of Iodine in Edible Salt in Iranian Households Living in the Southern Province of Khorasan-e-Razavi Using WHO Standards (Years 2010–2015)

Table 2

Monthly salt sampling frequencies and their gamma iodine values.

Valuable	% Iodine/ppm			Total	P value
	<20	20–50	>50
Month
Apr	6	9	2	17	0.300
May	5	12	0	17
Jun	2	4	0	6
Jul	0	2	0	2
Aug	1	4	0	5
Sep	0	5	0	5
Oct	3	3	0	6
Nov	0	1	0	1
Dec	1	7	0	8
Jan	3	6	0	9
Mar	1	2	3	5
Total	22	55	5	82