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. 2007 Nov 30;7:345. doi: 10.1186/1471-2458-7-345

Table 4.

Iron nutritional status by hemoglobin and ferritin concentrations, by region and care regimen

Regular Regimen (RR)
Total Regular Regimen
n = 2324
N = 1022247 		North
n = 639
N = 337,221 		Center
n = 712
N = 301,192 		South
n = 574
N = 193,493 		Mexico City and periurban area
n = 399
N = 190,340
Iron status n N % 95% CI n N % 95% CI n N % 95% CI n N % 95% CI n N % 95% CI
Normal a 1298 582313 57.0f 52.1, 61.7 375 206383 61.2g 50.3, 71.1 499 203988 67.7g 58.9, 75.4 207 67839 35.1g 32.4, 37.8 217 104103 54.7g 41.9, 66.9
Iron deficiency without anemia b 530 224550 22.0 18.2, 26.3 168 82056 24.3 17.8, 32.3 116 51229 17.0 14.6, 19.8 169 53701 27.8 16.0, 43.6 77 37563 19.7 14.9, 25.7
Anemiac 496 215385 21.0 17.1, 25.6 96 48781 14.5 11.0, 18.8 97 45976 15.3 10.1, 22.5 198 71953 37.2 22.7, 54.5 105 48675 25.6 18.6, 34.0
Iron deficiency anemia d 248 105942 10.3 8.6, 12.4 49 24073 7.1 4.6, 10.9 59 30173 10.0 7.0, 14.1 102 34511 17.8 12.2, 25.4 38 17185 9.0 5.2, 15.3
Anemia due to other causes e 248 109443 10.7 8.0, 14.2 47 24708 7.3 4.8, 11.1 38 15803 5.2 2.5, 10.5 96 37442 19.4 10.2, 33.7 67 31490 16.5 13.0, 20.8
IMSS-Oportunidades (IO)
Total IMSS-Oportunidades
n = 1325
N = 98150 		North
n = 539
N = 4195 		Center
n = 479
N = 10882 		South
n = 307
N = 83074
Iron status n N % 95% CI n N % 95% CI n N % 95% CI n N % 95% CI
Normal a 681 60873 62.0f 53.2, 70.2 294 2308 55.0h 46.8, 63.0 192 4668 42.9h 33.9, 52.4 195 53897 64.9h 54.6, 73.9
Iron deficiency without anemia b 362 20110 20.5 13.8, 29.2 132 1140 27.2 21.0, 34.4 171 4240 39.0 29.3, 49.6 59 14730 17.7 10.9, 27.6
Anemiac 282 17167 17.5 13.2, 22.8 113 746 17.8 9.1, 31.9 116 1974 18.1 8.0, 36.2 53 14447 17.4 12.7, 23.4
Iron deficiency anemia d 137 6873 7.0 4.7, 10.3 62 441 10.5 4.8, 21.4 57 984 9.0 4.2, 18.3 18 5448 6.6 4.0, 10.5
Anemia due to other causes e 145 10294 10.5 7.4, 14.7 51 305 7.3 3.9, 13.2 59 990 9.1 3.6, 21.1 35 5448 10.8 7.4, 15.7

N Population size (expanded sample)

a Hemoglobin above the cut-off point for anemia and ferritin > = 10 μg/L

b Ferritin < 10 μg/L and Hb > = cut-off for anemia

c Hb < cut-off for anemia

d Ferritin < 10 μg/L and Hb < cut-off for anemia

e Ferritin = 10 μg/L and Hb < cut-off for anemia

f Comparing nutritional iron status between regimens p = 0.499

g,h Comparing iron status between regions gRR<0.001; hIO = 0.012