TABLE 3

M-CHAT Screening Rate and Results, by Patients and Visits

n (%)
Children seen for 18- or 24-mo visits36 223
 One M-CHAT at either 18- or 24-mo visit
  Completed26 364 (72.8)
  Not completed9859 (27.2)
 M-CHAT at 18- and 24-mo visits (if attended both visits, n = 20 072)
  Completed10 916 (54.4)
  Not completed9156 (45.6)
 M-CHAT result (n = 26 364)
  Positive (on at least 1 screen)704 (2.7)
  Negative25 660 (97.3)
Visits at either 18- or 24-mo59 139
 M-CHAT
  Completed37 426 (63.3)
  Not completed21 713 (36.7)
 18-mo visit M-CHAT (n = 30 695)
  Completed18 878 (61.5)
  Not completed11 817 (38.5)
 24-mo visit M-CHAT (n = 28 444)
  Completed18 548 (65.2)
  Not completed9896 (34.8)
 18-mo M-CHAT result (n = 18 878)
  Positive460 (2.4)
  Negative18 418 (97.6)
 24-mo M-CHAT result (n = 18 548)
  Positive303 (1.6)
  Negative18 245 (98.4)
Children with ASD522
 At least 1 M-CHAT
  Completed378 (72.4)
  Not completed144 (27.6)
 Completed M-CHATs (n = 378)
  1 M-CHAT at either 18- or 24-mo visit)228 (60.3)
  18- and 24-mo visit150 (39.7)
 M-CHAT result (n = 378)
  Positive125 (33.1)
  Negative253 (66.9)
 M-CHAT negative (n = 253)
  18-mo visit but not 24-mo visit83 (32.8)
  24-mo visit but not 18-mo visit82 (32.4)
  18- and 24-mo visits88 (34.8)