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Table 1 Socioeconomic, demographic and anthropometric characteristics of the elementary school children, broken down by whether they study at public or private schools. Maceió, Alagoas, Brazil, 2013

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

Variables Total n (%) Type of school p
Private n (%) Public n (%)
Economic class  
 A 15 (1.4) 15 (2.9) 0 (0.0)  
 B 205 (19.3) 192 (36.4) 13 (2.4)  
 C 485 (45.6) 260 (49.3) 225 (42.0)  
 D 333 (31.3) 57 (10.8) 276 (51.5)  
 E 25 (2.4) 3 (0.6) 22 (4.1)  
 D + E 358 (33.7) 60 (11.4) 298 (55.6) <0,001a
Head of household (sex)  
 Male 531 (62.8) 287 (69.8) 244 (56.1)  
 Female 315 (37.2) 124 (30.2) 191 (43.9) <0.001
Father in work  
 Yes 708 (82.3) 411 (93.6) 297 (70.5)  
 No 152 (17.7) 28 (6.4) 124 (29.5) <0,001
Number of household members  
 <6 852 (82.2) 466 (89.1) 386 (75.1)  
 ≥ 6 185 (17.8) 57 (10.9) 128 (24.9) <0,001
Color of skin / Ethnicity  
 Brown 812 (56.2) 264 (46.5) 548 (62.4)  
 White 427 (29.5) 261 (46.0) 166 (18.9)  
 Black 175 (12.1) 26 (4.6) 149 (17.0) <0.001b
 Oriental 28 (1.9) 15 (2.6) 13 (1.5)  
 Indigenous 4 (0.3) 2 (0.3) 2 (0.2)  
Classification of nutritional status by BMI-for-age  
 Overweight (1 < z ≤ 2) 253 (18.3) 117 (20.8) 136 (16.6)  
 Obese (z > 2) 213 (15.4) 125 (22.2) 88 (10.7) <0,001
 Excess weight (z > 1) 466 (33.7) 242 (43.0) 224 (27.3)  
Classification of nutritional status by height-for-age  
 Stunting (z < -2) 24 (1.7) 4 (0.7) 20 (2.3) 0.016
Birth weight (BW)  
 Low (BW < 2500 g) 75 (8.4) 31 (6.7) 44 (10.3) 0.051
 High (BW ≥ 4000 g) 69 (7.7) 43 (9.2) 26 (6.1) 0.078
  1. N.B. The sum of the total number varies because of data gaps
  2. aA dichotomous analysis was conducted of the highest categories (A + B + C) compared with the lowest categories (D + E)
  3. bA dichotomous analysis was conducted comparing “black” with the sum of the other categories (brown, white, oriental, and indigenous)