Table 1

Sociodemographic characteristics of the study population (N=390)

12–24 months (n=249)25–36 months (n=141)Total sample (n=390)
Mean±SD or n (%)Mean±SD or n (%)Mean±SD or n (%)
Toddler
 Sex
  Boy133 (53.4%)84 (59.6%)217 (55.6%)
  Girl116 (46.6%)57 (40.4%)173 (44.4%)
 Ethnicity
  Han246 (98.8%)139 (98.6%)385 (98.7%)
  Other minorities3 (1.2%)2 (1.4%)5 (1.3%)
 Only child
  Yes190 (76.3%)100 (71.4%)291 (74.6%)
  No59 (23.7%)40 (28.6%)99 (25.4%)
 Exclusively breast feeding for the first 6 months
  Yes178 (71.5%)96 (68.1%)274 (70.3%)
  No71 (28.5%)45 (31.9%)116 (29.7%)
Primary caregiver
 Relationship to toddler
  Parents154 (61.8%)95 (67.4%)249 (63.8%)
  Grandparents90 (36.1%)45 (31.9%)135 (34.6%)
  Other5 (2.0%)1 (0.7%)6 (1.5%)
 Sex
  Female247 (99.2%)140 (99.3%)387 (99.2%)
  Male2 (0.8%)1 (0.7%)3 (0.8%)
 Age (years)39.8±12.939.1±13.039.6±12.9
 Education
  Primary school17 (6.8%)8 (5.7%)25 (6.4%)
  Middle school34 (13.7%)20 (14.2%)54 (13.8%)
  High school63 (25.3%)39 (27.7%)102 (26.2%)
  College and above135 (54.2%)74 (52.5%)209 (53.6%)
 Family monthly income level (RMB)
  2000–500013 (5.2%)10 (7.1%)23 (5.9%)
  5000–10 00067 (26.9%)35 (24.8%)102 (26.2%)
  10 000–15 00082 (32.9%)48 (34.0%)130 (33.3%)
  ≥15 00087 (34.9%)48 (34.0%)135 (34.6%)