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Table 3 Results of multivariate linear regression analysis for the first child breastfeeding duration and various socioeconomic factors

From: Breastfeeding duration of different age groups and its associated factors among Chinese women: a cross-sectional study

  Urban Rural
  β p β p
Intercept 16.8 < 0.0001 9.9 < 0.0001
Age groups −0.7 < 0.0001 −0.6 < 0.0001
Highest educationa
 Middle school −1.3 < 0.0001 −0.6 < 0.0001
 High school& above −1.6 < 0.0001 −1.2 < 0.0001
Household size −0.1 < 0.0001 0.2 < 0.0001
BMI at 25 years old 0.4 < 0.0001 0.2 < 0.0001
Age at menarche 0.2 < 0.0001 0.2 < 0.0001
Oral contraceptive pills use −0.5 < 0.0001 −2.8 < 0.0001
Age at first birth −0.2 < 0.0001 0.2 < 0.0001
  1. aReference: no formal school & primary school
  2. Model is adjusted for regional difference, age groups, highest level of education, household size, BMI at age 25, age at menarche, use of oral contraceptive pills and age at first birth