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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

From: Risk of suicide and accidental deaths among elderly patients with cognitive impairment

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)
  1. Abbreviation: CI confidence interval, CREDOS Clinical Research Center for Dementia of Korea, PYAR person-years at risk, SMR standardized mortality ratio
  2. *Other dementia: dementia with Lewy bodies (DLB), frontotemporal dementia (FTD), and unspecified dementia