Table 2 Likelihood of Ages and Stages Questionnaire domain and total scores below the threshold (<−2 SD) at age 4 per week/month later age at which a child first smiles (in weeks)^a and walks (in months)^a: odds ratios (OR) crude and stratified by gestational age group

ASQ

OR

95%-CI

P-value

OR

95%-CI

P-value

OR

95%-CI

P-value

Communication

1.10

0.97–1.24

0.13

1.07

0.74–1.54

0.71

1.22

0.98–1.52

0.080

Personal-Social

1.04

0.90–1.20

0.64

1.02

0.62–1.66

0.95

1.31

1.02–1.67

0.031

Problem Solving

1.09

0.93–1.28

0.29

1.08

0.68–1.70

0.75

1.43

1.05–1.95

0.022

Fine Motor

0.93

0.82–1.07

0.31

1.28

0.72–2.25

0.40

1.16

0.93–1.46

0.18

Gross Motor

1.05

0.92–1.19

0.47

1.15

0.80–1.66

0.46

1.36

1.03–1.80

0.031

Total Score

1.05

0.93–1.19

0.42

1.24

0.88–1.76

0.23

1.35

1.08–1.67

0.007

ASQ

OR

95%-CI

P-value

OR

95%-CI

P-value

OR

95%-CI

P-value

Communication

1.06

0.01–1.13

0.029

1.14

0.97–1.34

0.12

1.06

0.99–1.13

0.12

Personal-Social

1.12

1.05–1.20

0.001

1.33

1.07–1.65

0.010

1.10

1.01–1.18

0.021

Problem Solving

1.06

0.99–1.14

0.099

0.93

0.71–1.23

0.63

1.06

0.97–1.15

0.18

Fine Motor

1.13

1.06–1.20

< 0.001

1.20

0.98–1.48

0.083

1.07

1.00–1.15

0.066

Gross Motor

1.21

1.13–1.30

< 0.001

1.35

1.14–1.60

< 0.001

1.15

1.06–1.25

0.001

Total Score

1.16

1.09–1.23

< 0.001

1.26

1.04–1.52

0.016

1.13

1.05–1.22

0.002