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Table 1 Demographic characteristics of the participants in ASD and TD groups

From: Association of feeding patterns in infancy with later autism symptoms and neurodevelopment: a national multicentre survey

Variable

ASD(N = 1389), Median (IQR)/N (%)

TD(N = 1190), Median (IQR)/N (%)

Z/χ2

P

Age, years

3.94(3.11,4.90)

4.40(3.37,5.36)

-6.101

 < 0.001

Gender

 Male

1138(81.9)

784(65.9)

86.931

 < 0.001

 Female

251(18.1)

406(34.1)

Residence

 Urban

1036(74.6)

1058(88.9)

90.230

 < 0.001

 Rural

334(24.0)

117(9.8)

 Miss

19(1.4)

15(1.3)

Annual family income, RMBa

  < 50,000

615(44.3)

307(25.8)

146.726

 < 0.001

 50,000 ~ 100,000

403(29.0)

290(24.4)

  > 100,000

313(22.5)

506(42.5)

 Miss

58(4.2)

87(7.3)

Paternal education level

 Primary education

22(1.6)

7(0.6)

48.743

 < 0.001

 Secondary education

553(39.8)

333(28.0)

 Secondary education above

798(57.5)

838(70.4)

 Miss

16(1.1)

12(1.0)

Maternal education level

 Paternal education level

33(2.4)

14(1.2)

110.647

 < 0.001

 Primary education

623(44.9)

309(26.0)

 Secondary education

727(52.3)

863(72.5)

 Miss

6(0.4)

4(0.3)

  1. Data were shown as Median (IQR) or number (percentage)
  2. Differences in annual family income and parental education levels were found between the ASD and TD groups after the multiple comparison for each subgroup, and passed the Bonferroni corrections
  3. ASD autism spectrum disorder; TD typically developing, IQR inter-quartile range. Chi-square test and Mann–Whitney test were used in the analysis
  4. a1 RMB≈0.155 US Dollars