Table 2.
Suicide attempt: comparison of administrative data using E-codes against suicide attempt notation in chartc, both during the past 12 months prior to and including the index date
| Unweighted Estimates, %b (N in fraction) | |||||
|---|---|---|---|---|---|
| Samples | Agreement | Sensitivity | Specificity | PPV | NPV |
| Suicide Death | 88 (323/368) | 17 (9/53) | 100 (314/315) | 90 (9/10) | 88 (314/358) |
| Control | 99 (359/362) | 0 (0/3) | 100 (359/359) | NA1 | 99 (359/362) |
| AD New User | 97 (554/571) | 11 (2/19) | 100 (552/552) | 100 (2/2) | 97 (552/569) |
| Combineda | 93 (682/730) | 16 (9/56) | 100 (673/674) | 90 (9/10) | 94 (673/720) |
| Weighted Estimates, %b (95% confidence interval) | |||||
| Suicide Death | 87 (82, 92) | 19 (5, 32) | 100 (100, 100) | 96 (85, 100) | 87 (82, 91) |
| Control | 100 (99, 100) | 0 | 100 | NA1 | 100 (99, 1.00) |
| AD New User | 98 (95, 100) | 25 (0, 72) | 100 | NA2 | 98 (95, 100) |
| Combineda | 100 (99, 100) | 2 (0, 5) | 100 (100, 100) | NA1 | 100 (99, 100) |
Abbreviation: NA1 is not appropriate (inappropriate to estimate because the N of the denominator is 0 for the unweighted estimate and thus the corresponding weighted estimates based partly or entirely on the control sample are also inappropriate); NA2 is not appropriate (inappropriate because weighting would be based on N = 2); AD is antidepressant; PPV is positive predictive value of an administrative diagnosis; NPV is the negative predictive value of an administrative diagnosis.
a Combined sample of suicide deaths and controls
b Rounded to a whole number
c The chart notation had to be clear it was referring to a suicide attempt occurring in the past 12 months.