Skip to main content

Table 1 Characteristics of sample (N = 2938)

From: Socioeconomic status and breastfeeding in China: an analysis of data from a longitudinal nationwide household survey

Variables n (%)
Household characteristics
 Household income per capita (RMB) (mean, s.d) 11,482 (28,446)
 Residential regions
  Eastern China 1172 (39.9)
  Central China 852 (29.0)
  Western China 914 (31.1)
 Residence
  Urban 990 (33.7)
  Rural 1948 (66.3)
Parental characteristics
 Mother’s educational status
  Middle school and below 2058 (70.1)
  High school or above 738 (25.1)
  Missing data 142 (4.8)
 Father’s educational status
  Middle school and below 1951 (66.4)
  High school or above 800 (27.2)
  Missing data 187 (6.4)
 ISEI score for mother’s occupation
  16–32/unemployment 2079 (70.8)
  33–43 480 (16.3)
  44–58 256 (8.7)
  59–90 123 (4.2)
 ISEI score for father’s occupation
  16–32/unemployment 2011 (68.5)
  33–43 564 (19.2)
  44–58 218 (7.4)
  59–90 145 (4.9)
 Mother’s marital status
  Single 44 (1.5)
  Married 2864 (97.5)
  Divorced/widowed 22 (0.7)
  Missing data 8 (0.3)
 Parity
  Primipara 1653 (56.3)
  Multipara 1285 (43.7)
 Age of mother (years) (mean, s.d) 27.35 (4.79)
 Age of father (years) (mean, s.d) 29.37 (5.09)
Infant characteristics
 Breastfeeding duration (months) (mean, s.d) 8.66 (6.15)
 Gender
  Male 1549 (52.7)
  Female 1389 (47.3)
 Place of delivery
  Health facility 2767 (94.2)
  Others 129 (4.4)
  Missing data 42 (1.4)
 Ethnicity
  Han 2590 (88.2)
  Minority 348 (11.8)
 Birth weight
  Below 2500 g 126 (4.3)
  Normal 2495 (84.9)
  Above 4000 g 245 (8.3)
  Missing data 72 (2.5)
 Gestational age (weeks)
  Less than 37 1490 (50.7)
  37–42 1343 (45.7)
  Over 42 52 (1.8)
  Missing data 53 (1.8)
 Birth year
  2010 713 (24.3)
  2011 692 (23.6)
  2012 648 (22.0)
  2013 549 (18.7)
  2014 336 (11.4)
  1. The ISEI score refers to occupational status, with higher values indicating higher occupational status