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Table 1 Demographic characteristics of the participants in the two groups and the type of breast variation

From: The effect of maternal breast variations on neonatal weight gain in the first seven days of life

Variables Groups
  Group A
With specified variations
(n = 50)
Group B
Normal breast
(n = 50)
  n % n %
Maternal age (years)**     
   <20 7 14 7 14
   20-29 31 62 30 60
   30+ 12 24 13 26
Maternal education*  
   did not complete high school 18 36 19 38
   completed high school 25 50 23 46
   Higher 7 14 8 16
Annual family income**     
   Low 0 0 1 2
   Moderate 39 78 41 82
   High 11 22 8 16
Breast variation***     
   flat nipple 27 54 0 0
   large nipple 17 34 0 0
   large breast 12 24 0 0
   inverted nipple 7 14 0 0
Infant birth weight (g)     
   < 3000 16 32 14 28
   3000-3999 32 64 34 68
   ≥4000 2 4 2 4
Infant gender*     
   Male 21 24 20 40
   Female 29 58 30 60
Gestational age (weeks)*     
   37-38 10 20 9 18
   39-40 28 56 29 58
   41-42 12 24 12 24
  1. *Chi-Square showed no significant difference between the two groups.
  2. **t-test and Mann-Whitney U test showed no significant difference between the two groups.
  3. ***About one-quarter of mothers with breast variations (n = 13) had more than one variation.