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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