Table 4:
Suicide Attempt Definition and Screening List Validation Results Versus Instrument Responses in Two Populations
| ICD List | Validation Cohort | TP N | FP N | TN N | FN N | SN | SP | PPV |
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| NCHS List | CSP572, BE | 710 | 149 | 4330 | 3962 | 15.20% | 96.67% | 0.827 |
| SA Definition | CSP572, BE | 718 | 165 | 4314 | 3954 | 15.37% | 96.32% | 0.813 |
| SA Screen | CSP572, BE | 796 | 218 | 4261 | 3876 | 17.04% | 95.13% | 0.785 |
| NCHS List | CSP572, AT | 1072 | 310 | 4169 | 3600 | 22.95% | 93.08% | 0.776 |
| SA Definition | CSP572, AT | 1096 | 353 | 4126 | 3576 | 23.46% | 92.12% | 0.756 |
| SA Screen | CSP572, AT | 1196 | 423 | 4056 | 3476 | 25.60% | 90.56% | 0.739 |
| NCHS List | VUMC, All | 2339 | 979 | 6320 | 2456 | 48.78% | 86.59% | 0.705 |
| SA Definition | VUMC, All | 1585 | 544 | 6755 | 3219 | 32.99% | 92.55% | 0.744 |
| SA Screen | VUMC, All | 2740 | 1895 | 5404 | 2064 | 57.04% | 74.04% | 0.591 |
| NCHS List | VUMC, MSA | 471 | 57 | 322 | 245 | 65.78% | 84.96% | 0.892 |
| SA Definition | VUMC, MSA | 415 | 36 | 343 | 301 | 57.96% | 90.50% | 0.920 |
| SA Screen | VUMC, MSA | 509 | 123 | 256 | 207 | 71.09% | 67.55% | 0.805 |
| NCHS List | VUMC, Clin | 2035 | 971 | 6057 | 2236 | 47.65% | 86.18% | 0.677 |
| SA Definition | VUMC, Clin | 1311 | 543 | 6485 | 2960 | 30.70% | 92.27% | 0.707 |
| SA Screen | VUMC, Clin | 2403 | 1836 | 5192 | 1868 | 56.26% | 73.88% | 0.567 |
Key: TP = true positive; FP = false positive; TN = True negative; FN = False negative; SN = Sensitivity; N = counted total number of individuals; SP = Specificity; PPV = Positive Predictive Value; SA = Suicide attempt; NCHS List = National Center for Health Statistics published ICD list; BE = Before study enrollment; AT = any time (after study enrollment); VUMC = Vanderbilt University Medical Center; MSA = Manually selected individuals with a high enrichment of prior history of suicide attempt; Clin = Psychiatric urgent care clinical sample.