TABLE 4.
Demographics of children with DCD and typically developing peers.
| Children with DCD (n = 36) | Typically developing children (n = 17) | Statistical difference | |
|---|---|---|---|
| Age at assessment, mean (SD), range, years:months | 9:6 (0:9), 8:3–10:11 | 9:4 (0:11), 8:3–10:10 | t (5) = 0.727, p = 0.474 |
| Male, n (%) | 28 (78) | 10 (59) | p = 0.197 |
| Right‐handed, n (%) | 32 (89) | 12 (71) | p = 0.126 |
| Born at fewer than 37 weeks, n (%) | 4 (11) | 0 (0) | p = 0.314 |
| Maternal education in years, median (IQR), range | 7 (3.75–8.0), 2–13 | 8 (7–10), 2–13 | U = 192.5, p = 0.014 |
| Co‐occurring or suspected diagnoses, a n (%) | 23 (67) | 0 (0) | – |
| Number of co‐occurring diagnoses, n (%) | |||
| One | 14 (39) | 0 (0) | – |
| Two | 2 (6) | 0 (0) | – |
| Three | 4 (11) | 0 (0) | – |
| Four | 3 (8) | 0 (0) | – |
| Type of co‐occurring diagnoses, n (%) | |||
| Speech and language disorders | 10 (28) | 0 (0) | – |
| Dyslexia | 10 (28) | 0 (0) | – |
| Autism spectrum disorder or autistic traits | 6 (17) | 0 (0) | – |
| ADHD | 10 (28) b | 0 (0) | – |
| Conners 3 ADHD probability index, median (IQR), range | 99 (91–99), 51–99 | 11 (11–11), 11–56 | – |
| CCC‐2 communication profile indicative of autism spectrum disorder or autistic traits | 19 (53) | 1 (6) | |
Abbreviations: ADHD, attention‐deficit/hyperactivity disorder; CCC‐2, Children's Communication Checklist; DCD, developmental coordination disorder; IQR, interquartile range. aReported as either confirmed or under clinical investigation by parents during a semi‐structured telephone interview.
b
Treated with medication at the time of the assessment, n = 3.