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Table 1 Descriptive statistics of 2029 participants

From: Association between dietary patterns and cognitive ability in Chinese children aged 10–15 years: evidence from the 2010 China Family Panel Studies

 

Number

Percentage (%)

Gender

 Girl

1001

50.7

 Boy

1028

49.3

Age

 10

342

16.9

 11

348

17.2

 12

325

16.0

 13

320

15.8

 14

334

16.5

 15

360

17.7

Nationality

 Minority nationality

235

11.6

 Han nationality

1794

88.4

Household registration

 Countryside

1228

60.5

 Urban

801

39.5

School

 Common school

1940

95.6

 Key school

89

4.4

Father education level a

 Low

935

46.1

 Medium

973

48.0

 High

121

6.0

Mother education level a

 Low

1245

61.4

 Medium

693

34.2

 High

91

4.5

Family learning environment

 Bad

195

9.61

 Neutrality

877

43.22

 Good

957

47.17

Annual household income (per person)

  < 3500RMB

680

33.5

 3500 – 7000RMB

696

34.3

  > 7000RMB

653

32.2

Family size

 3 – 6

1822

89.8

 7 – 14

207

10.2

Mathematics test (score)b

 0–8

536

26.4

 9–11

476

23.5

 12–14

536

26.4

 14–24

481

23.7

Vocabulary test (score)c

 0–17

486

24.0

 18–22

504

24.8

 23–26

462

22.8

 27–34

577

28.4

  1. aEducation level: low (completed primary school or lower); medium (completed junior middle school but did not undergo the tertiary entrance exam); and high (had taken the tertiary entrance exam or higher)
  2. bThe scores of mathematics test ranged from 0 to 24
  3. cThe scores of vocabulary test ranged from 0 to 34