Age (month)

Normal gross motor skills (N = 38)

Delayed gross motor skills (N = 13)

Relative risk (RR) (95% CI)

[12 - 36[

19

6

1.040 (0.755 - 1.433)

[36 - 66[

19

7

0.891 (0.347 - 2.287)

Total

38

13

1.167 (0.330 - 4.122)