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Table 2 Socio-demographic factors, skin color of the child, performance of domestic chores by the child and child labor in the two birth cohorts.

From: Prevalence of non-communicable diseases in Brazilian children: follow-up at school age of two Brazilian birth cohorts of the 1990's

Variables   Ribeirão Preto   São Luís P value
  n % weighted* n % weighted*  
Sex      0.724
   Female 402 50.8 348 51.7  
   Male 388 49.2 325 48.3  
Skin color of the child      <0.001
   White 444 56.3 158 23.5  
   Black 31 4.3 50 7.1  
   Brown/Mulatto 304 37.9 463 69.1  
   Yellow/Indigenous 11 1.5 2 0.3  
Monthly family income (minimum wages)      <0.001
   < 1 36 4.5 149 23.0  
   1 to <4 396 50.1 454 69.8  
   4 to < 10 243 32.6 33 4.8  
   ≥ 10 103 12.8 19 2.5  
   Missing 12 - 18 -  
Occupation of household head      <0.001
   Non-manual 150 19.1 85 12.3  
   Manual skilled/semiskilled 296 37.5 200 30.0  
   Unskilled manual/unemployed 340 43.4 384 57.8  
   Missing 4 - 4 -  
Maternal schooling (years)      0.001
   0 to 4 345 43.9 223 34.4  
   5 to 8 164 21.6 154 23.4  
   ≥ 9 273 34.5 278 42.2  
   Missing 8 - 18 -  
Paternal schooling (years)      0.002
   0 to 4 372 48.0 248 38.9  
   5 to 8 148 19.5 128 20.3  
   ≥ 9 261 32.5 256 40.8  
   Missing 9 - 41 -  
Performance of domestic chores by the child      <0.001
   Yes 686 87.3 644 95.7  
   No 104 12.7 27 4.4  
   Missing 0 - 2 -  
Child labor      0.269
   Yes 24 2.9 13 1.9  
   No 766 97.2 659 98.1  
   Missing 0 - 1 -  
  1. Ribeirão Preto, 2004/05 and São Luís, 2005/06.
  2. * Percentages may not add to 100% because of rounding. Missing values were excluded from percentages and P-value calculations.