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Table 3 Ferritin concentration and prevalence of iron deficiency, by region, age group, and care regimen

From: Prevalence of anemia and deficiency of iron, folic acid, and zinc in children younger than 2 years of age who use the health services provided by the Mexican Social Security Institute

Region/Age groups Regular Regimen (RR) IMSS-Oportunidades (IO)
  n N Ferritin concentration μg/L Prevalence of iron deficiency* n N Ferritin concentration μg/L Prevalence of iron deficiency*
    Mean 95% CI % 95% CI    Mean 95% CI % 95% CI
North             
< 6 months 84 40776 66.2 43.3, 89.0 4.3 2.6, 7.1 72 460 132.3 64.1, 200.5 6.1 2.3, 15.2
6–11 months 268 138802 30.6 25.2, 35.0 25.6 18.6, 34.2 139 1148 26.4 16.6, 36.2 36.9 30.1, 44.2
12–23 months 295 163476 16.1 12.8, 19.4 44.1 26.5, 63.3 332 3239 28.0 15.2, 40.8 43.3 32.6, 54.6
Total North 647 343054 27.9 15.3, 40.5 31.9 a 23.5, 41.6 543 4848 37.5 23.7, 51.4 38.2 a 31.7, 45.2
Center             
< 6 months 147 55228 96.4 56.2, 136.6 4.6 1.5, 13.0 33 703 65.6 8.5, 122.7 13.8 8.1, 22.4
6–11 months 282 119726 30.1 25.2, 35.0 19.4 16.2, 23.0 138 3644 21.1 4.6, 37.5 49.7 30.4, 69.1
12–23 months 348 177310 18.2 13.4, 23.0 39.0 33.4, 44.8 322 9268 25.8 1.0, 58.3 48.1 37.5, 58.8
Total Center 777 352264 34.5 22.0, 47.0 26.8 a 22.7, 31.4 493 13615 26.6 1.0, 54.1 46.7 a 32.9, 61.1
South             
< 6 months 25 14352 81.9 65.8, 97.9 21.0 13.5, 31.3 19 5007 50.4 33.1, 67.8 21.8 11.5, 37.5
6–11 months 239 79886 19.4 15.4, 23.4 37.3 30.4, 44.8 97 25128 59.3 24.0, 94.6 24.4 9.7, 49.1
12–23 months 401 123384 13.2 8.8, 17.5 54.4 43.8, 64.6 207 54992 35.8 16.7, 54.9 24.3 16.9, 33.6
Total South 665 217622 20.2 12.0, 27.9 46.2 a 37.4, 55.3 323 85127 43.6 18.6, 68.6 24.2 a 16.0, 34.7
Mexico City &             
< 6 months 64 30872 87.9 70.5, 105.2 7.2 4.6, 11.2       
6–11 months 152 77977 32.2 28.9, 35.6 28.8 17.7, 43.4       
12–23 months 195 88543 26.4 16.2, 36.5 36.7 29.5, 44.4       
Total Mexico City & 411 197392 38.3 25.8, 50.8 28.9 a 19.1, 41.1       
NATIONAL             
< 6 months 320 141228 84.3 63.2, 105.5 6.8 4.3, 10.9 124 6170 58.3 41.2, 75.4 19.7 11.4, 31.8
6–11 months 941 416391 28.6 23.9, 33.3 26.7 22.8, 30.9 374 29920 53.4 21.7, 85.1 28.0 13.2, 49.7
12–23 months 1239 552713 17.8 15.1, 20.4 43.6 37.1, 50.2 861 67500 34.0 17.9, 50.2 28.4 22.3, 35.5
TOTAL NATIONAL 2500 1110332 30.3 24.2, 36.4 32.6 b 28.8, 36.6 1359 100230 41.1 20.0, 62.1 27.8 b 20.2, 36.9
  1. N Population size (expanded sample)
  2. * Ferritin <10 μg/L
  3. & Mexico City and periurban area
  4. a Comparing between regions within each regimen, RR = 0.015; IO = 0.007.
  5. b Comparing between regimens, national level, p = 0.287