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Table 1 Participant characteristics of the ELGAN2 subset and ELGAN2 cohort

From: Innovative computational approaches shed light on genetic mechanisms underlying cognitive impairment among children born extremely preterm

Variable name

ELGAN2 subset (N = 528)

ELGAN2 (N = 889)

n (% or SD)

n (% or SD)

Infant sex

 Male

274 (51.9%)

455 (51.2%)

 Female

254 (48.1%)

434 (48.8%)

Cognitive impairment

 No/Low

390 (73.9%)

660 (74.2%)

 Moderate/Severe

138 (26.1%)

214 (24.1%)

 Not reported

0

15 (1.7%)

Gestational age

26.1 (1.27)

26.1 (1.28)

Maternal education

 ≤ 12 years

205 (38.8%)

355 (39.9%)

 13–15 years

119 (22.5%)

202 (22.7%)

 16+ years

204 (38.6%)

306 (34.4%)

 Not reported

0

26 (2.9%)

Maternal smoking

 Yes

128 (24.2%)

215 (24.2%)

 No

400 (75.8%)

655 (73.7%)

 Not reported

0

19 (2.1%)

Race

 White

342 (64.8%)

554 (62.3%)

 Black

133 (25.2%)

227 (25.5%)

 Other

53 (10.0%)

98 (11.0%)

 Not reported

0

10 (1.1%)

Public insurance

 Yes

167 (31.6%)

307 (34.5%)

 No

361 (68.4%)

568 (63.9%)

 Not reported

0

14 (1.6%)

Multiple births

 Yes

189 (35.8%)

313 (35.2%)

 No

339 (64.2%)

576 (64.8%)