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Table 2 Prevalence of anemia, prevalence ratio (PR) and respective confidence interval at 95 % for selected variables amongst children from public 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 461 (51.9) 39 (8.5) 1 0.019*
 Male 427 (48.1) 57 (13.3) 1.57 (1.07; 2.32)
Duration of exclusive breastfeeding
 ≥ 6 months 156 (51.0) 16 (10.3) 1 0.786
 < 6 months 150 (49.0) 14 (9.3) 0.91 (0.45; 1.80)
Prenatal care
 Yes 481 (84.4) 47 (9.7) 1 0.095
 No 89 (15.6) 14 (15.7) 1.61 (0.92; 2.79)
Employment status of father
 Employed (formal / informal) 294 (71.2) 23 (7.8) 1 0.077
 Unemployed 119 (28.8) 16 (13.5) 1.71 (0.94; 3.13)
Employment status of mother
 Unemployed 328 (60.4) 34 (10.4) 1 0.769
 Employed (formal / informal) 215 (39.6) 24 (11.2) 1.07 (0.63; 1.83)
Number of household members
 < 6 375 (74.8) 33 (8.8) 1 0.026*
 ≥ 6 126 (25.1) 20 (15.9) 1.80 (1.07; 3.02)
Per capita income
 >2.00 dollars/day 243 (60.3) 20 (8.2) 1 0.161
 ≤2.00 dollars/day 160 (39.7) 20 (12.5) 1.51 (0.84; 2.73)
Recipient of government benefits
 No 127 (23.1) 14 (11.0) 1 0.795
 Yes 411 (76.4) 42 (10.2) 0.92 (0.52; 1.64)
Height-for-age
 ≥ −2 z (eutrophic) 800 (97.5) 83 (10.4) 1 0.957
 < −2 z (stunted) 20 (2.5) 2 (10. 0) 0.96 (0.25; 3.64)
BMI-for-age
 ≤ 2 z (eutrophic) 704 (89.4) 76 (10.8) 1 0.088
 > 2 z (obese) 83 (10.5) 4 (4.8) 0.44 (0.16; 1.18)
Consumption of meat, fish or poultry
 ≥1 portions 773 (87.2) 84 (10.9) 1 0.937
 0 portions 113 (12.8) 12 (10.6) 0.97 (0.55; 1.71)
Consumption of fruits/fruit juices
 ≥3 portions 80 (9.0) 4 (5.0) 1 0.078
 <3 portions 805 (91.0) 92 (11.4) 2.28 (0.86; 6.05)
Consumption of fruits/fruit juices
 ≥2 portions 242 (27.3) 15 (6.2) 1 0.006*
 <2 portions 643 (72.6) 81 (12.6) 2.03 (1.19; 3.45)
Consumption of coffee
 0 portions 412 (46.4) 36 (8.7) 1 0.064
 ≥ 1 portions 476 (53,6) 60 (12,6) 1,89 (1,00; 1,4)
  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