Table 1.

Descriptive statistics of infant age, sex, and anthropometric measures for infants included and excluded in further analyses.

EEG

fNIRS

1-month

5-months

18-months

1-month

5-months

18-months

Included

Excluded

Included

Excluded

Included

Excluded

Included

Excluded

Included

Excluded

Included

Excluded

Characteristics

Sex (m/f)

87/85

17/15

76/77

22/21

67/59

26/37

76/60

27/40

72/66

29/32

54/60

39/36

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

x̄ ± SD

Age (days)

44.31 ± 28.01

42.72 ± 26.40

161.108 ± 10.52

158.79 ± 10.43

573.61 ± 39.01

564.39 ± 38.91

42.01 ± 29.14

44.91 ± 28.96

158.91 ± 9.89

162.86 ± 11.42

561.97 ± 39.56

571.72 ± 39.65

Weight (kg)

4.391 ± 0.624

4.274 ± 0.573

6.821 ± 0.814

6.791 ± 0.717

9.52 ± 0.921

9.49 ± 1.031

4.221 ± 0.471

4.467 ± 0.615

6.792 ± 0.783

6.924 ± 0.835

9.63 ± 1.052

9.39 ± 0.891

Length (cm)

54.132 ± 1.912

52.912 ± 2.811

63.972 ± 1.967

64.092 ± 2.245

79.413 ± 3.12

78.201 ± 2.92

51.917 ± 2.275

55.395 ± 1.984

65.392 ± 2.192

60.214 ± 2.423

79.912 ± 3.01

78.261 ± 3.29

Head circumference (cm)

36.411 ± 2.113

37.121 ± 1.981

42.351 ± 1.425

41.663 ± 1.342

46.831 ± 1.653

47.318 ± 1.583

37.204 ± 1.211

36.123 ± 1.922

42.938 ± 1.623

40.916 ± 1.562

48.391 ± 1.284

45.326 ± 1.572

Anthropometric z-scores

WAZ

−0.498 ± 0.871

−0.531 ± 0.918

−0.653 ± 0.892

−0.625 ± 0.916

−0.971 ± 0.921

−1.051 ± 0.957

−0.521 ± 0.973

−0.491 ± 0.981

−0.692 ± 0.928

−0.651 ± 0.914

−1.0821 ± 1.027

−1.0271 ± 1.205

LAZ

−0.913 ± 0.915

−0.832 ± 0.899

−0.5986 ± 0.983

−0.641 ± 0.893

−1.112 ± 0.792

−1.372 ± 1.392

−0.877 ± 0.941

−0.824 ± 0.951

−0.611 ± 0.951

−0.613 ± 0.941

−1.148 ± 0.810

−1.319 ± 1.124

HCZ

−0.614 ± 0.798

−0.579 ± 0.893

−0.712 ± 0.974

−0.761 ± 0.951

−0.942 ± 0.9752

−0.892 ± 0.891

−0.528 ± 0.913

−0.519 ± 0.893

−0.749 ± 0.897

−0.751 ± 0.956

- 1.021 ± 1.129

−0.823 ± 0.975

WLZ

0.427 ± 0.980

0.341 ± 1.126

−0.261 ± 0.981

−0.245 ± 1.021

−0.812 ± 1.072

−0.741 ± 0.985

0.386 ± 1.314

0.321 ± 0.986

−0.26 ± 1.21

−0.269 ± 0.983

−0892 ± 1.042

−0.856 ± 1.032

Note. No differences between infants included and excluded in analyses were seen regarding sex, age, weight, length, head circumference, WAZ = weight-for-age z-scores, LAZ = length-for-age z-scores, HCZ = head circumference-for-age z scores or WLZ = weight-for-length z scores. (all p > 0.172).