Table 2.
Comparisons between different approaches to scoring the Death Brief Implicit Association Test (BIAT)
| Remove 1st trial | Remove 1st 4 trials | |||||||
|---|---|---|---|---|---|---|---|---|
| 6 Blocks | 4 Blocks | 2 Blocks | 6 Block | 4 Block | 2 Block | |||
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| LT-SA vs LT-No SA | Cohen’s D | 0.43 (0.25 - 0.62) | 0.39 (0.21 - 0.58) | 0.30 (0.12 - 0.47) | 0.41 (0.23 - 0.60) | 0.39 (0.21 - 0.58) | 0.32 (0.14 - 0.49) | |
| AUC-ROC non-zero threshold | 0.62 (0.56 - 0.67) | 0.61 (0.55 – 0.66) | 0.58 (0.52 – 0.63) | 0.61 (0.55 – 0.66) | 0.60 (0.55 – 0.65) | 0.58 (0.53 – 0.64) | ||
| AUC-ROC zero threshold | 0.59 (0.55 - 0.64) | 0.59 (0.55 – 0.63) | 0.56 (0.51 – 0.60) | 0.57 (0.53 – 0.62) | 0.59 (0.54 – 0.63) | 0.56 (0.52 – 0.60) | ||
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| LT-SA vs. LT-SI | Cohen’s D | 0.31 (0.13 - 0.52) | 0.30 (0.11 - 0.50) | 0.22 (0.03 - 0.41) | 0.29 (0.10 - 0.50) | 0.30 (0.10 - 0.49) | 0.24 (0.05 - 0.43) | |
| AUC-ROC non-zero threshold | 0.58 (0.53 - 0.64) | 0.58 (0.53 - 0.63) | 0.56 (0.51 - 0.61) | 0.57 (0.52 - 0.63) | 0.58 (0.53 - 0.63) | 0.56 (0.51 - 0.62) | ||
| AUC-ROC zero threshold | 0.57 (0.53 - 0.62) | 0.57 (0.53 - 0.62) | 0.54 (0.49 - 0.58) | 0.55 (0.50 - 0.59) | 0.57 (0.52 - 0.61) | 0.55 (0.50 - 0.59) | ||
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| PY-SA vs. LT-SA | Cohen’s D | 0.55 (0.20 - 0.87) | 0.51 (0.26 - 0.95) | 0.51 (0.26 - 0.95) | 0.54 (0.21 - 0.87) | 0.50 (0.27 - .97) | 0.50 (0.27 - .97) | |
| AUC-ROC non-zero threshold | 0.65 (0.57 - 0.74) | 0.66 (0.58 - 0.75) | 0.64 (0.55 - 0.73) | 0.65 (0.58 - 0.74) | 0.66 (0.58 - 0.76) | 0.64 (0.55 - 0.73) | ||
| AUC-ROC zero threshold | 0.61 (0.52 - 0.69) | 0.62 (0.54 - 0.70) | 0.61 (0.53 - 0.69) | 0.60 (0.52 - 0.68) | 0.62 (0.54 - 0.71) | 0.62 (0.53 - 0.70) | ||
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| PY-SA vs. PW-SI | Cohen’s D | 0.74 (0.33 - 1.19) | 0.68 (0.29 - 1.11) | 0.55 (0.18 - 0.96) | 0.70 (0.29 – 1.17) | 0.65 (0.25 – 1.10) | 0.56 (0.17 - 0.98) | |
| AUC-ROC non-zero threshold | 0.72 (0.62 - 0.82) | 0.70 (0.60 - 0.79) | 0.65 (0.55 - 0.75) | 0.71 (0.61 - 0.81) | 0.69 (0.59 - 0.79) | 0.66 (0.55 - 0.76) | ||
| AUC-ROC zero threshold | 0.67 (0.58 - 0.75) | 0.64 (0.55 - 0.72) | 0.62 (0.53 - 0.71) | 0.62 (0.54 - 0.71) | 0.64 (0.55 - 0.72) | 0.63 (0.54 - 0.72) | ||
| Odd-Even Reliability | 0.73 (0.69 - 0.77) | 0.68 (0.63 - 0.73) | 0.64 (0.58 - 0.68) | 0.68 (0.63 - 0.72) | 0.64 (0.59 - 0.69) | 0.59 (0.53 - 0.64) | ||
Note: LT-SA vs LT-No SA = Lifetime suicide attempt (n=182) vs. No lifetime suicide attempt (n=388); LT-SA vs. LT-SI = Lifetime suicide attempt (n=182) vs. Lifetime suicidal ideation (with no history of a suicide attempt) (n=302); PY-SA vs. LT-SA = Past year suicide attempt (n=37) vs. Lifetime (but not past year) suicide attempt (n=134); PY-SA vs. PW-SI = Past week suicide ideation and past year suicide attempt (n=37) vs. past week suicide ideation (with no lifetime history of attempts) (n=121). AUC-ROC = Area under the curve for the receiver operating characteristic. Parentheses contain 95% bootstrapped confidence intervals.