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Table 1 Sociodemographic and economic characteristics of study sample by median urinary iodine concentration (N = 358)

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

Variable N (percentage) Median UIC in μg/l (IQR)
Age in years
 < 8 36(10.1) 237.5[150.3235.4]
 8–10 102(28.5) 206.8[155.6303.1]
 > 10 220(61.5) 239.7[161.7327.6]
Sex
 Male 155 (43.3) 238.1 [156.1, 326.9]
 Female 203 (56.7) 228.0 [161.8, 314.8]
Residence
 Urban 69 (19.3) 254.8 [207.8, 319.1]*
 Rural 289 (80.7) 228.0 [151.1, 321.1]*
Religion
 Orthodox 351 (98.0) 235.4 [161.3, 323.5]
 Muslim 7 (2.0) 230.4 [120.2, 260.6]
Maternal educational status
 Illiterate 284(79.3) 235.8[161.3, 314.6]
 Elementary school(grade 1–8) 40 (11.2) 226.8 [165.9352.8]
 High school(grade 9–10) 19 (5.3) 236.2 [139.7339.4]
 Preparatory school(grade11–12), College/ university 15(4.2) 234.2[152.6, 279.2]
Paternal educational status
 Illiterate 239(66.7) 236.5 [161.7, 320.1]
 Elementary school(grade1–8) 79 (22.1) 220.5 [147.7, 313.0]
 High school(grade 9–10) 16 (4.5) 254.4 [231.4, 343.6]
 Preparatory school(grade11–12), College/ university 24(6.7) 227.5[144.1, 353.1]
 Preparatory school(grade11–12) 8 (2.2) 249.3 [159.5, 406.0]
 College/ university 16 (4.5) 209.4 [139.8, 333.5]
Maternal marital status
 Single a 9 (2.5) 236.5 [175.6, 312.4]
 Married 313 (87.4) 234.5 [159.6, 324.0]
 Divorced 15 (4.2) 256.7 [165.9, 324.8]
 Widowed 21 (5.9) 211.0 [124.2, 284.9]
Wealth Index
 Poor 118 (33.0) 231.7 [163.3304.6]
 Medium 121 (33.8) 224.1 [140.4322.7]
 Rich 119 (33.2) 238.6 [169.1330.5]
  1. IQR Inter quartile range, aNever Married *P < 0.001 from the ANOVA test