Table 3 Distribution (%) of Q-CHAT’s item ratings at 18 (18 M) and 24 months (24 M)
| Â | Q-CHAT item ratings (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Â | 0 | 1 | 2 | 3 | 4 | |||||
Q-CHAT items | 18Â M | 24Â M | 18Â M | 24Â M | 18Â M | 24Â M | 18Â M | 24Â M | 18Â M | 24Â M |
1. Looks when name called | 60.3 | 60.4 | 30.4 | 31.6 | 7.9 | 6.8 | 1.4 | 1.3 | 0.0 | 0.0 |
2. Eye contact | 46.7 | 52.3 | 45.7 | 40.2 | 6.8 | 6.8 | 0.8 | 0.5 | 0.0 | 0.3 |
3. Lines objects upa | 10.1 | 6.1 | 32.6 | 17.4 | 37.8 | 45.5 | 14.7 | 19.9 | 4.9 | 11.1 |
4. Understand child’s speech | 9.0 | 10.9 | 20.4 | 35.1 | 39.9 | 41.2 | 16.6 | 9.8 | 14.1 | 3.0 |
5. Proto-imperative pointing | 76.4 | 64.1 | 17.7 | 23.5 | 4.6 | 9.6 | 0.8 | 1.8 | 0.5 | 1.0 |
6. Proto-declarative pointing | 59.5 | 54.5 | 25.8 | 29.0 | 10.6 | 12.4 | 2.2 | 2.8 | 1.9 | 1.3 |
7. Interest maintained by spinning objecta | 19.8 | 21.2 | 46.7 | 47.5 | 23.1 | 19.7 | 7.9 | 7.6 | 2.4 | 4.0 |
8. Number of wordsa | 1.4 | 10.6 | 3.8 | 11.1 | 31.5 | 49.7 | 48.6 | 23.7 | 14.7 | 4.8 |
9. Pretend play | 40.8 | 24.5 | 35.6 | 35.4 | 18.8 | 23.0 | 1.9 | 10.1 | 3.0 | 7.1 |
10. Follows a look | 41.3 | 33.6 | 37.5 | 41.9 | 16.0 | 18.9 | 4.6 | 3.3 | 0.5 | 2.3 |
11. Sniffs/licks unusual objectsa | 17.4 | 25.8 | 19.3 | 35.1 | 21.2 | 20.7 | 27.2 | 2.6 | 14.9 | 5.8 |
12. Uses hand as toola | 6.5 | 6.3 | 4.3 | 7.8 | 14.9 | 19.2 | 29.1 | 32.6 | 45.1 | 34.1 |
13. Walks on tiptoesa | 27.2 | 24.5 | 19.8 | 28.3 | 37.2 | 37.6 | 9.5 | 5.8 | 6.3 | 3.8 |
14. Adapts to changes in routine | 19.8 | 17.7 | 67.1 | 68.2 | 11.7 | 11.1 | 1.1 | 1.5 | 0.3 | 1.5 |
15. Offers comfort | 20.9 | 23.5 | 29.1 | 28.8 | 29.6 | 31.3 | 13.6 | 11.4 | 6.8 | 5.1 |
16. Does same thing over and over againa | 5.2 | 12.1 | 6.8 | 14.1 | 16.8 | 23.2 | 32.1 | 30.3 | 39.1 | 20.2 |
17. Typicality of first words | 37.0 | 43.4 | 44.6 | 47.0 | 8.4 | 6.1 | 3.0 | 1.5 | 7.1 | 2.0 |
18. Echolaliaa | 9.0 | 6.3 | 9.0 | 5.1 | 16.6 | 15.9 | 37.5 | 32.1 | 28.0 | 40.7 |
19. Gestures | 75.0 | 68.2 | 19.6 | 25.5 | 4.6 | 5.6 | 0.8 | 0.3 | 0.0 | 0.5 |
20. Unusual finger movementsa | 38.0 | 44.2 | 14.4 | 18.9 | 17.4 | 16.9 | 20.7 | 13.1 | 9.5 | 6.8 |
21. Checks reaction | 25.5 | 22.7 | 38.0 | 33.6 | 24.7 | 33.3 | 10.3 | 7.8 | 1.4 | 2.5 |
22. Maintenance of interesta | 30.4 | 22.2 | 36.4 | 36.6 | 22.8 | 30.3 | 7.1 | 7.6 | 3.3 | 3.3 |
23. Twiddles objects repetitivelya | 12.2 | 23.7 | 16.0 | 28.0 | 27.2 | 24.7 | 34.5 | 17.9 | 10.1 | 5.6 |
24. Oversensitive to noisea | 17.1 | 22.7 | 42.4 | 39.6 | 25.0 | 27.0 | 10.3 | 7.3 | 5.2 | 3.3 |
25. Stares at nothing with no purposea | 64.9 | 67.9 | 17.4 | 19.2 | 12.5 | 9.1 | 3.8 | 3.0 | 1.4 | 0.8 |