Table 1.

The percent of children who screened positive and negative on the M-CHAT and were marked as abnormal on the items listed on the left. The items are ordered in 4 sets that group them functionally and items that require multiple capabilities are listed multiple times. Bolded italicized items are M-CHAT “critical items”

	M-CHAT (column %)
	Positive	Negative	Row N
Motor items
3. Does not like climbing	18	1	46
6. Does not point to ask	48	2	117
7. Does not point to indicate interest	50	1	115
8. Does not play with small toys	35	1	82
9. Does not bring objects to you	28	0	62
13. Does not imitate you	38	2	94
16. Does not walk	30	2	78
Vision items
2. Does not show interest in others	16	1	43
4. Does not enjoy peek a boo	10	1	26
5. Does not pretend	30	1	67
6. Does not point to ask	48	2	117
7. Does not point to indicate interest	50	1	115
8. Does not play with small toys	35	1	82
9. Does not bring objects to you	28	0	62
10. Does not look you in the eye	14	1	36
12. Does not smile in response to smile	4	0	9
13. Does not imitate you	38	2	94
15. Does not follow when you point at a toy	31	1	72
17. Does not look at things you look at	27	1	64
22. Stares at nothing or wanders with no purpose	42	8	153
23. Does not look at your face for reaction	34	5	109
Hearing items
11. Is oversensitive to noise	48	17	232
14. Does not respond to name	9	0	21
20. Have you wondered if child is deaf	21	2	57
21. Does not understand what people say	19	0	42
Other items
1. Does not enjoy being swung	8	1	26
18. Makes unusual finger movements	33	9	138
19. Does not try to attract your interest	30	4	91
Total	212	776	988