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Table 1 Characteristics of sample children (6–12 months) (N = 1245)

From: Trajectories of child cognitive development during ages 0–3 in rural Western China: prevalence, risk factors and links to preschool-age cognition

Characteristic

Frequency (n)

Percentage (%) or Mean ± SD

Child

 Gender

  Male

640

51.4

  Female

605

48.6

 Whether the child was premature

  Yes

58

4.7

  No

1187

95.3

 Whether the child has siblings

  Yes

298

23.9

  No

947

76.1

Household

 Mother is primary caregiver

  Yes

1058

85.0

  No

187

15.0

 Maternal age

  < 25

476

38.2

  ≥ 25

769

61.8

 Maternal education level (years)

  < 12

1057

84.9

  ≥ 12

188

15.1

 Family asset index

1245

−0.1 ± 1.2

  1. Asset index constructed using polychoric principal components of the following variables: tap water, toilet, water heater, washing machine, computer, Internet, refrigerator, air conditioning, motorcycle or electronic bicycle, and automobile