Variable | N^{a} | Ratio (95% CI) | z Test, P | TOST | |
---|---|---|---|---|---|

z_{1} P | z_{2}P | ||||

PPV^{b} | .001 | .94 | <.001 | ||

M-CHAT | 98 | 0.68 (0.59–0.78) | |||

PCP M-CHAT/F | 98 | 0.88 (0.81–0.94) | |||

PPV^{c} | .51 | .09 | .004 | ||

PCP M-CHAT/F | 98 | 0.88 (0.81–0.94) | |||

AC M-CHAT/F | 97 | 0.84 (0.62–0.80) | |||

Sensitivity^{c} | .60 | .19 | .03 | ||

PCP M-CHAT/F | 98 | 0.52 (0.42–0.62) | |||

AC M-CHAT/F | 97 | 0.48 (0.39–0.58) | |||

Specificity^{c} | .56 | .11 | .008 | ||

PCP M-CHAT/F | 98 | 0.84 (0.77–0.91) | |||

AC M-CHAT/F | 97 | 0.81 (0.73–0.89) | |||

Accuracy^{c} | .62 | .18 | .03 | ||

PCP M-CHAT/F | 98 | 0.62 (0.53–0.72) | |||

AC M-CHAT/F | 97 | 0.59 (0.49–0.69) |

Developmental Delay Positive was defined as >1.5 SDs below the mean on ≥2 Mullen scales or >2 SDs below the mean on ≥1 Mullen scale. Comparisons were made with 2-tailed

*z*test and TOST, Δ = 0.1 unit of proportion. Only patients with a positive screen on the M-CHAT are included in this sample. CI, confidence interval.↵a One patient did not have a complete AC M-CHAT/F (Fig 1).

↵b Trivial difference.

↵c Equivalence.