Table 2.
Comparison of SMR for suicide and accidental death according to gender, age, and type of cognitive impairment at the time of CREDOS registration
| Variables | PYAR | Suicide death | Accidental death | ||||
|---|---|---|---|---|---|---|---|
| Observed death, N | Expected death, N | SMR (95% CI) | Observed death, N | Expected death, N | SMR (95% CI) | ||
| All (N = 10,169) | 65,255 | 45 | 46.01 | 0.98 (0.71–1.31) | 138 | 95.61 | 1.44 (1.22–1.71) |
| Gender | |||||||
| Men (N = 3475) | 20,429 | 19 | 24.06 | 0.79 (0.48–1.23) | 73 | 42.71 | 1.71 (1.34–2.15) |
| Women (N = 6694) | 44,826 | 26 | 18.34 | 1.42 (0.93–2.08) | 65 | 47.76 | 1.36 (1.05–1.73) |
| Age at time of registration | |||||||
| < 65 years (N = 1721) | 12,211 | 5 | 4.96 | 1.01 (0.33–2.35) | 10 | 6.34 | 1.58 (0.76–2.90) |
| 65 years ≤ (N = 8447) | 53,034 | 40 | 41.03 | 0.97 (0.70–1.33) | 128 | 89.26 | 1.43 (1.20–1.71) |
| Type of cognitive impairment | |||||||
| Alzheimer’s dementia (N = 4322) | 26,291 | 21 | 20.23 | 1.04 (0.64–1.59) | 78 | 45.46 | 1.72 (1.36–2.14) |
| Vascular dementia (N = 924) | 5320 | 3 | 3.97 | 0.75 (0.16–2.21) | 18 | 8.41 | 2.14 (1.27–3.38) |
| Other dementia* (N = 663) | 4070 | 3 | 2.43 | 1.23 (0.67–1.47) | 4 | 4.46 | 0.90 (0.24–2.30) |
| Mild cognitive impairment (N = 4260) | 29,574 | 18 | 19.36 | 0.93 (0.55–1.47) | 38 | 37.28 | 1.02 (0.72–1.40) |
Abbreviation: CI confidence interval, CREDOS Clinical Research Center for Dementia of Korea, PYAR person-years at risk, SMR standardized mortality ratio
*Other dementia: dementia with Lewy bodies (DLB), frontotemporal dementia (FTD), and unspecified dementia