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Table 5 Weighted factor scores (wfs; proportions) and Cohen's d values of USQ and SBQ factors ( N= 4,237)

From: Different stability of social-communication problems and negative demanding behaviour from infancy to toddlerhood in a large Dutch population sample

Factors USQ (T1)

Class 1

Class 2

Class 3

Class 4

Class 5

F (4, 4232); p#

32.9%

35.8%

4.4%

17.1%

9.8%

wfs

d

wfs

d

wfs

d

wfs

d

wfs

d

1 Deviant communication

0.06

0.00

0.09

0.36

0.40

2.49 **

0.31

2.12 **

0.13

0.69

962.86; < 0.001

2 Negative emotionality

0.08

0.00

0.23

2.43 **

0.30

2.80 **

0.10

0.43

0.45

4.67 **

2,904.45; < 0.001

3 Deviant reactive behaviour

0.00

0.00

0.00

-0.04

0.00

0.08

0.00

0.02

0.00

0.10

3.68; < 0.001

4 Deviant play behaviour

0.00

0.00

0.00

0.13

0.06

0.57

0.02

0.30

0.01

0.29

55.35; < 0.001

5 Demanding behaviour

0.27

0.00

0.22

-0.27

0.32

0.23

0.30

0.20

0.54

1.08 *

203.11; < 0.001

6 Social anxiety/inhibition

0.07

0.00

0.10

0.25

0.14

0.52

0.07

0.07

0.17

0.69

53.27; < 0.001

7 Advanced social interaction problems

0.04

0.00

0.06

0.40

0.25

2.04 **

0.14

1.30 *

0.09

0.81 *

527.95; < 0.001

8 Basic social interaction problems

0.01

0.00

0.03

0.30

0.11

0.77

0.03

0.34

0.07

0.67

88.53; < 0.001

9 Sleep problems

0.10

0.00

0.16

0.38

0.26

0.90 *

0.13

0.22

0.30

1.14 *

138.49; < 0.001

Factors SBQ (T2)

Class 1

Class 2

Class 3

Class 4

Class 5

F (4, 4232); p #

31.4%

36.7%

9.3%

17.1%

5.5%

wfs

d

wfs

d

wfs

d

wfs

d

wfs

d

1 Language problems

0.03

0.00

0.04

0.19

0.29

1.39 **

0.10

0.62

0.13

0.69

351.52; < 0.001

2 Negative emotionality

0.06

0.00

0.22

2.39 **

0.26

2.50 **

0.08

0.44

0.44

4.03 **

2,087.01; < 0.001

3 Attention-deficit/hyperactivity problems

0.06

0.00

0.21

0.97 *

0.34

1.59 **

0.11

0.37

0.47

2.00 **

451,86; < 0.001

4 Deviant play behaviour

0.01

0.00

0.03

0.29

0.21

1.27 *

0.13

0.95 *

0.10

0.77

313.50; < 0.001

5 Demanding behaviour

0.33

0.00

0.19

-0.99 *

0.24

-0.63

0.31

-0.17

0.71

2.42 **

680.53; < 0.001

6 Deviant affective behaviour

0.00

0.00

0.01

0.27

0.13

1.07 *

0.04

0.61

0.07

0.81 *

263.49; < 0.001

7 Communication and interaction problems

0.04

0.00

0.06

0.67

0.24

2.41 **

0.15

2.20 **

0.13

1.32 **

1,188.02; < 0.001

8 Sleep problems

0.10

0.00

0.21

0.44

0.24

0.53

0.10

-0.03

0.34

0.84 *

86.07; < 0.001

  1. #The weighted factor score is the obtained factor sum score divided by the maximum factor sum score, and has a value between 0 and 1. Higher scores indicated that children lacked more competences or showed more problems. Most differences in weighted factor scores between classes were significant (p < 0.001). However, the following contrasts were not significantly different: USQ: factor 3 classes 1, 2, 3, 4, and 5; factor 4 classes 1 and 2, classes 2 and 5, classes 4 and 5; factor 5 classes 1, 3, and 4; factor 6 classes 1, 2, and 4, classes 3 and 5; factor 8 classes 2 and 4; factor 9 classes 3 and 5. SBQ: factor 1 classes 1 and 2, classes 4 and 5; factor 4 classes 4 and 5; factor 5 classes 1 and 4; factor 6 classes 1 and 2; factor 8 classes 1 and 4, classes 2 and 3.
  2. Cohen’s d: comparison between the weighted factor score of class 1 versus classes 2, 3, 4, and 5; * large effect size (d ≥ 0.80); ** very large effect size (d ≥ 1.30).