Characteristics | Elderly patients with CO | Elderly patients without CO | IRR (95 % CI) | p-value | ||||||
---|---|---|---|---|---|---|---|---|---|---|
N | Death | PYa | Rateb | N | Death | PYa | Rateb | |||
All | 965 | 289 | 5131.3 | 56.32 | 9650 | 1456 | 59034.95 | 24.66 | 2.29 (2.01–2.59) | <0.0001 |
Age (years) | ||||||||||
65–74 | 531 | 128 | 3097.15 | 41.33 | 5322 | 643 | 34007.74 | 18.91 | 2.19 (1.81–2.65) | <0.0001 |
75–84 | 360 | 129 | 1720.28 | 74.99 | 3599 | 688 | 21018.46 | 32.73 | 2.29 (1.9–2.76) | <0.0001 |
≥85 | 74 | 32 | 313.87 | 101.95 | 729 | 125 | 4008.75 | 31.18 | 3.27 (2.22–4.82) | <0.0001 |
Gender | ||||||||||
Male | 502 | 194 | 2611.37 | 74.29 | 5020 | 877 | 31878.11 | 27.51 | 2.7 (2.31–3.16) | <0.0001 |
Female | 463 | 95 | 2519.93 | 37.7 | 4630 | 579 | 27156.85 | 21.32 | 1.77 (1.42–2.2) | <0.0001 |
Comorbidity | ||||||||||
DM | 291 | 113 | 1446.51 | 78.12 | 1502 | 341 | 8489.47 | 40.17 | 1.94 (1.57–2.41) | <0.0001 |
HTN | 438 | 134 | 2286.75 | 58.6 | 3369 | 621 | 19093.71 | 32.52 | 1.8 (1.49–2.17) | <0.0001 |
Renal disease | 57 | 28 | 218.35 | 128.23 | 254 | 78 | 1308.83 | 59.6 | 2.18 (1.41–3.36) | 0.0004 |
Stroke | 120 | 52 | 543.46 | 95.68 | 798 | 215 | 4255.75 | 50.52 | 1.89 (1.4–2.56) | <0.0001 |
CHF | 49 | 19 | 208.15 | 91.28 | 238 | 78 | 1207.95 | 64.57 | 1.41 (0.86–2.33) | 0.176 |
Liver disease | 43 | 15 | 235.48 | 63.7 | 345 | 85 | 2011.18 | 42.26 | 1.51 (0.87–2.61) | 0.143 |
Cancer | 59 | 30 | 211.4 | 141.91 | 364 | 104 | 1670.29 | 62.26 | 2.28 (1.52–3.42) | <0.0001 |
COPD | 133 | 52 | 644.82 | 80.64 | 847 | 256 | 4937.64 | 51.85 | 1.56 (1.15–2.1) | 0.0037 |
Follow-up period | ||||||||||
0–1 month | 965 | 7 | 80.15 | 87.34 | 9650 | 15 | 803.5 | 18.67 | 5.01 (2.02–12.42) | 0.0005 |
1–6 months | 958 | 43 | 389.54 | 110.39 | 9635 | 86 | 3997.24 | 21.52 | 5.13 (3.56–7.4) | <0.0001 |
6–12 months | 915 | 37 | 448.48 | 82.5 | 9549 | 127 | 4742.7 | 26.78 | 3.08 (2.14–4.44) | <0.0001 |
1–2 years | 878 | 51 | 815.21 | 62.56 | 9422 | 188 | 8964.55 | 20.97 | 2.98 (2.19–4.07) | <0.0001 |
2–4 years | 757 | 64 | 1305.36 | 49.03 | 8489 | 328 | 14932.6 | 21.97 | 2.23 (1.71–2.92) | <0.0001 |
4–6 years | 552 | 39 | 917.42 | 42.51 | 6389 | 320 | 10909.76 | 29.33 | 1.45 (1.04–2.03) | 0.0274 |
>6 years | 380 | 48 | 1175.14 | 40.85 | 4604 | 392 | 14684.61 | 26.69 | 1.53 (1.13–2.06) | 0.0054 |