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Table 3 Median urinary iodine concentration of study sample by level of iodine in salt, dietary diversity score, goiter grade and source of drinking water (N = 358)

From: Iodine status five years after the mandatory salt iodization legislation indicates above requirement: a cross sectional study in Northwest Ethiopia

Variables N (percentage) Median UIC in μg/l (IQR)
Salt iodine level(ppm)
 Not iodized (0) 9 (2.5) 95.0 [67.1, 248.5]
 Inadequately iodized (< 15) 239 (66.8) 229.5 [145.8, 313.6]*
 Adequately iodized (≥15) 110 (30.7) 243.6 [195.4, 347.1]*
Maternal knowledge of iodized salt use
 Poor 180 (50.3) 230.0 [154.2, 309.6]
 Good 178 (49.7) 237.1 [161.8, 329.5]
Goiter grade
 No goiter 236 (65.9) 229.7 [161.9304.3]
 Grade 1 95 (26.5) 253.4 [145.8344.9]
 Grade 2 27 (7.5) 215.6 [161.3321.9]
Source of drinking water
 Tap(in the house/compound) 40 (11.2) 241.2 [163.0,346.5]
 Public tap 31 (8.7) 242.3 [152.9, 320.2]
 Protected well 71 (19.8) 220.8 [139.8, 334.8]
 Unprotected well 21 (5.9) 208.2 [163.4, 297.3]
 Protected spring 122 (34.1) 246.8 [169.8, 340.8]
 Unprotected spring 64 (17.9) 227.6 [137.5, 296.0]
 River 9 (2.5) 243.9 [215.2, 259.3]
Milk intake
 Once and above per week 50 (14.0) 242.1 [141.2351.6]
 No 308 (86.0) 234.1 [161.8313.5]
Meat intake
 Once and above per week 60 (16.8) 252.8 [145.8, 346.0]
 No 298 (83.2) 230.3 [161.6, 312.9]
Egg intake
 Once and above per week 27 (7.5) 250.9 [154.8, 351.6]
 No 331 (92.5) 230.4 [161.3, 314.8]
Cabbage intake
 Once and above per week 22 (6.1) 227.0 [118.6, 385.1]
 No 336 (93.9) 235.0 [161.7, 320.1]
Millet consumption
 Once and above per week 7 (0.2) 131.9 [93.2, 320.1]
 No 351 (98.0) 235.4 [161.7, 321.9]
DDS
 < 4 scores 323 (90.3) 234.5[161.6314.0]
 ≥4 scores 35 (9.8) 236.2 [139.8, 351.6]
  1. DDS Dietary diversity score, IQR Inter quartile range, ppm Parts per million, *P < 0.001 from the ANOVA test