Table 4. Association Between Motor Development at 18 Months and at 3 Years and Language Delay.
| Children Who Had Not Yet Attained Specific Motor Skills | No. (%) of Children | |||
|---|---|---|---|---|
| Total | No Language Delay | Moderate Language Delay | Severe Language Delay | |
| At 18 mo (n = 34 829)a | ||||
| Walks rather than crawls | 356 (1.0) | 276 (0.8) | 49 (4.3) | 31 (17.7) |
| Walks well, seldom falls | 619 (1.8) | 503 (1.5) | 77 (6.8) | 39 (22.3) |
| Walks stairs when hand held | 2352 (6.8) | 2123 (6.3) | 179 (15.7) | 50 (28.6) |
| Throws a small ball with forward arm movement | 2616 (7.5) | 2431 (7.3) | 143 (12.5) | 42 (24.0) |
| Stacks small blocks on top of another | 983 (2.8) | 883 (2.6) | 69 (6.1) | 31 (17.7) |
| Turn pages in book by himself/herself | 73 (0.2) | 51 (0.2) | 11 (1.0) | 11 (6.3) |
| At 3 years (n = 37 325)b | ||||
| Kicks a ball without support | 56 (0.2) | 30 (0.1) | 12 (1.0) | 14 (7.3) |
| Catches a ball with both hands | 898 (2.4) | 819 (2.3) | 62 (5.1) | 17 (8.8) |
| Holds pencil correctly, like an adult | 4230 (11.3) | 3915 (10.9) | 275 (22.6) | 40 (20.7) |
| Can undo button(s) | 3906 (10.5) | 3561 (9.9) | 283 (23.3) | 62 (32.1) |
a
Children with missing data were excluded (n=4125).
b
Children with missing data were excluded (n=1629).