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. 2018 Jul-Sep;36(3):275–285. doi: 10.1590/1984-0462/;2018;36;3;00013

Table 3: Crude prevalence rates of anemia and its 95% confidence intervals, according to the characteristics of the children aged 6 to 23 months receiving care at Health Units of Vitória da Conquista, Bahia, Brazil, 2010/2011 (n=366).

n (%) Prevalence of anemia (%) PR (crude) 95%CI p-valuea
Gender
Female 183 (50.0) 27.9 1 0.66-1.29 0.637
Male 183 (50.0) 25.7 0.92
Age (months)
12 to 23 199 (54.4) 18.6 1 1.38-2.80 <0.001*
6 to 11 167 (45.6) 36.5 1.96
Skin color
White 188 (51.2) 25.0 1 0.79-1.58 0.518
Non white 175 (48.2) 28.0 1.12
Gestational age at birth (weeks)
≥37 338 (92.9) 26.9 1 0.42-1.77 0.677
<37 26 (7.1) 23.1 0.86
Weight at birth (g)
≥2500 326 (89.8) 26.4 1 0.66-1.91 0.657
<2500 37 (10.2) 29.7 1.13
Previous hospitalization
No 249 (68.2) 26.9 1 0.69-1.43 0.971
Yes 116 (31.8) 26.7 0.99
Weight/age index (score Z)
≥-2 344 (95.6) 27.0 1 0.39-2.20 0.860
<-2 16 (4.4) 25.0 0.92
Height/age index (score Z)
≥-2 311 (86.4) 27.0 1 0.60-1.62 0.944
<-2 49 (13.6) 26.5 0.98
Weight/height ratio (score Z)
≥-2 340 (94.4) 27.1 1 0.42-2.02 0.842
<-2 20 (5.6) 25.0 0.92

PR: prevalence ratio; 95%CI: 95% confidence intervals; aPearson’s chi-squared test; *statistical significance.