Table 2 Associations of Socioeconomic Status and Neurocognitive Development

Overall

Low

65,349

976 (1.5)

1.597 (1.439–1.772)

1.336 (1.111–1.606)

1.328 (1.105–1.597)

Intermediate

147,514

1,466 (1.0)

1.063 (0.964–1.171)

0.984 (0.859–1.126)

0.983 (0.859–1.125)

High

60,298

364 (0.9)

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Gross motor

Low

64,542

1,783 (2.8)

1.388 (1.288–1.495)

1.271 (1.116–1.447)

1.268 (1.113–1.444)

Intermediate

145,779

3,201 (2.2)

1.103 (1.031–1.180)

1.064 (0.968–1.169)

1.063 (0.967–1.169)

High

59,674

1,188 (2.0)

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Fine motor

Low

64,060

2,265 (3.5)

1.506 (1.408–1.612)

1.323 (1.174–1.489)

1.320 (1.173–1.487)

Intermediate

145,209

3,771 (2.6)

1.106 (1.040–1.177)

1.064 (0.960–1.141)

1.046 (0.959 − 0.141)

High

59,466

1,396 (2.3)

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Cognition

Low

63,270

3,055 (4.8)

1.730 (1.626–1.837)

1.477 (1.330–1.640)

1.474 (1.327–1.637)

Intermediate

144,102

4,878 (3.4)

1.212 (1.145–1.282)

1.129 (1.045–1.220)

1.219 (1.045–1.220)

High

59,208

1,654 (2.8)

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Language

Low

63,174

3,151 (5.0)

1.747 (1.645–1.856)

1.457 (1.314–1.616)

1.455 (1.312–1.613)

Intermediate

143,971

5,009 (3.5)

1.219 (1.153–1.289)

1.115 (1.033–1.203)

1.114 (1.032–1.203)

High

59,173

1,689 (2.9)

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Sociality

Low

64,320

2,005 (3.1)

1.386 (1.292–1.486)

1.217 (1.077–1.375)

1.218 (1.078–1.376)

Intermediate

145,381

3,599 (2.5)

1.101 (1.033–1.173)

1.034 (0.946–1.129)

1.036 (0.946–1.130)

High

59,523

1,339 (2.2)

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Self-care

Low

64,841

1,484 (2.3)

1.198 (1.108–1.295)

1.129 (0.983–1.296)

1.128 (0.982–1.295)

Intermediate

146,163

2,817 (1.9)

1.009 (0.941–1.081)

0.981 (0.889–1.084)

0.981 (0.889–1.084)

High

59,721

1,141 (1.9)

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