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Table 3 Bayley Scales III mean and median raw scores for gross motor skills, fine motor skills, cognitive skills, receptive communication skills and expressive communication skills at follow-up visits corresponding to age corrected for gestational age

From: Growth and neurodevelopment in low birth weight versus normal birth weight infants from birth to 24 months, born in an obstetric emergency hospital in Haiti, a prospective cohort study

Bayley scale

Follow up visits corresponding to age (months)

NBW

LBW

n

Mean (SD)

Median [IQR]

n

Mean (SD)

Median (IQR)

Gross Motor skills

6

179

26.5 (5.3)

27 [1, 38]

332

24.2 (5.6)

25 [0, 38]

12

164

40 (6.6)

40 [4, 51]

312

38.6 (6.3)

39 [2, 52]

18

143

50.2 (5.9)

52 [8, 57]

251

48 (7.3)

50 [3, 56]

24

127

54.1 (6.3)

55 [5, 62]

218

53.4 (4.7)

55 [17, 61]

Fine motor skills

6

179

19.9 (3.7)

21 [5, 27]

312

12.9 (3.6)

14 [3, 19]

12

164

28.8 (4)

30 [6, 34]

251

17.4 (5)

17 [5, 28]

18

143

33.5 (4)

34 [7, 39]

218

24.2 (6.9)

25 [5, 39]

24

127

36.9 (4.5)

37 [12, 44]

312

12.9 (3.6)

14 [3, 19]

Cognitive skills

12

164

39.6 (7.7)

41 [5, 56]

312

40.1 (7.3)

41 [3, 52]

18

143

50.9 (8.2)

53 [10, 63]

251

48.9 (7.8)

51 [10, 61]

24

127

56.9 (8.6)

59 [14, 69]

218

55.3 (7.6)

56.5 [23, 67]

Receptive communication skills

12

164

13.1 (2.2)

13 [6, 18]

312

12.8 (2.3)

13 [3, 17]

18

143

18.5 (3.7)

19 [9, 26]

251

18.5 (3.7)

19 [6, 26]

24

127

24.2 (4.4)

25 [6, 31]

218

23.4 (4.5)

25 [11, 39]

Expressive communication skills

12

164

12.7 (3.4)

13 [2, 19]

312

12.9 (3.6)

14 [3, 19]

18

143

18.8 (4.9)

19 [4, 29]

251

17.4 (5)

17 [5, 28]

24

127

25.5 (7)

26 [5, 39]

218

24.2 (6.9)

25 [5, 39]

  1. NBW normal birth weight, LBW low birth weight