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Table 2 Characteristics of the children obtained at school age (frequency and weighted percentage)

From: Factors associated with prolonged non-nutritive sucking habits in two cohorts of Brazilian children

Variables RP/ 2004/05 SL/ 2004/05 P Value***
  n*(790) wtd%** n*(673) wtd%**  
Duration of breast-feeding (months) 0.017
< 6 374 46.7 275 42.4  
6-11 229 32.3 260 39.8  
≥ 12 152 21.0 115 17.8  
Duration of bottle feeding (months) <0.001
< 12 168 22.6 385 61.5  
12-23 136 18.0 128 21.0  
≥ 24 443 59.4 110 17.5  
Current occupation of the family head <0.001
Non-manual 150 19.1 85 12.1  
Skilled manual 296 37.5 200 29.9  
Unskilled manual 340 43.4 384 58.0  
Child’s age (years) <0.001
11 473 55.7 - -  
10 317 44.3 - -  
9 - - 98 14.4  
8 - - 572 85.2  
7 - - 3 00.4  
  1. *numbers may not add to total because missing values from same variables were excluded.
  2. **wtd%: weighted percentage. ***Chi-square test.
  3. Ribeirão Preto (RP) and São Luís (SL), 2004/05.