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Table 3 Prevalence of anemia, prevalence ratio (PR) and respective confidence interval at 95 % for selected variables amongst children from private elementary school in Maceió, Alagoas, Brazil, 2013

From: Prevalence of and factors associated with anemia in school children from Maceió, northeastern Brazil

Variables Total n (%) Anemia n (%) PR (CI95 %) p
Sex     
 Female 283 (50.8) 20 (7.1) 1 0.951
 Male 274 (49.2) 19 (6.9) 0.98 (0.53;1.79)
Duration of exclusive breastfeeding  
 ≥ 6 months 185 (46.7) 7 (3.8) 1  
 < 6 months 211 (53.3) 22 (10.4) 2.75 (1.20;6.30) 0.011*
Prenatal care     
 Yes 492 (96.7) 32 (6.5) 1  
 No 17 (3.3) 2 (11.8) 1.86 (0.44;7.82) 0.393
Employment status of father     
 Employed (formal / informal) 399 (93.4) 25 (6.3) 1  
 Unemployed 28 (6.6) 2 (7.1) 1.14 (0.28;4.57) 0.854
Employment status of mother     
 Unemployed 202 (39.5) 27 (8.7) 1  
 Employed (formal / informal) 309 (60.5) 7 (3.5) 2.52 (1.11;5.68) 0.019*
Number of household members     
 < 6 450 (88.9) 29 (6.4) 1  
 ≥ 6 56 (11.1) 4 (7.14) 1.1 (0.40;3.03) 0.842
Per capita income     
 >2.00 dollars/day 386 (96.3) 25 (6.5) 1  
 ≤2.00 dollars/day 15 (3.7) 1 (6.7) 1.02 (0.14; 7.11) 0.977
Recipient of government benefits     
 No 406 (78.1) 26 (6.4) 1  
 Yes 114 (21.9) 8 (7.0) 1.09 (0.50; 2.35) 0.815
School fees (R$)     
 ≥188.10 263 (49.1) 11 (4.2) 1  
 <188.00 273 (50.9) 26 (9.5) 2.27 (1.14; 4.51) 0.015*
Height-for-age     
 ≥ −2 z (eutrophic) 550 (99.3) 38 (6.9) 1  
 < −2 z (stunted) 4 (0.7) 1 (25.0) 3.61 (0.64; 20.33) 0.159
BMI-for-age     
 ≤ 2 z (eutrophic) 416 (77.8) 28 (6.7) 1  
 > 2 z (obese) 119 (22.2) 10 (8.4) 1.24 (0.62; 2.49) 0.531
Consumption of meat, fish or poultry
 ≥ 1 portion 477 (86.7) 35 (7.3) 1  
 0 portions 73 (13.3) 4 (5.5) 0.74 (0.27; 2.04) 0.565
Consumption of fruits/fruit juices     
 ≥ 3 portions 117 (21.3) 4 (3.4) 1  
 < 3 portions 433 (78.7) 35 (8.1) 2.36 (0.85; 6.52) 0.081
Consumption of fruits/fruit juices     
 ≥ 2 portions 219 (42.9) 12 (5.2) 1  
 < 2 portions 292 (57.1) 27 (8.5) 1.62 (0.84; 3.14) 0.140
Consumption of coffee     
 0 portions 367 (65.9) 26 (7.1) 1  
 ≥ 1 portion 190 (34.1) 13 (6.8) 0.97 (0.61; 1.54) 0.915
  1. *Indicates statistical significance (p < 0,05); PR Prevalence ratio, CI95 % confidence interval 95 %
  2. N.B. the sum of the total number varies because of data gaps