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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