Table 2.
30-, 90-, and 180-day Mortality Grouped by Frailty and Expanded Operative Stress Score
| Mortality | OSS1 | OSS2 | OSS3 | OSS4 | OSS5 |
|---|---|---|---|---|---|
| n=2,516 | n=30,725 | n= 38,820 | n=8,710 | n=1,498 | |
| 30-day Deaths, No. | 10 | 183 | 614 | 381 | 79 |
| 30-day Mortality by RAI % (95% CI) | |||||
| Robust (≤20) | 0.06 (0.00–0.31) | 0.14 (0.09–0.20) | 0.32 (0.25–0.40) | 1.83 (1.43–2.31) | 2.12 (1.02–3.87) |
| Normal (21–29) | 0.36 (0.04–1.28) | 0.96 (0.75–1.20) | 2.09 (1.83–2.38) | 5.10 (4.37–5.92) | 6.78 (5.19–8.68) |
| Frail (30–39) | 3.38 (1.11–7.71) | 5.10 (3.93–6.51) | 8.44 (7.45–9.53) | 6.95 (5.72–8.36) | 7.10 (3.60–12.34) |
| Very Frail (≥40) | 11.11 (1.38–34.71) | 14.63 (8.91–22.14) | 18.39 (14.46–22.87) | 27.15 (20.24–34.98) | 0.00 (0.00–19.51) |
| Overall Mortality | 0.40 (0.19–0.73) | 0.60 (0.51–0.69) | 1.58 (1.46–1.71) | 4.37 (3.95–4.83) | 5.27 (4.20–6.53) |
| 90-day Deaths, No. | 20 | 300 | 917 | 541 | 106 |
| Mortality by RAI, % (95% CI) | |||||
| Robust (≤20) | 0.11 (0.01–0.40) | 0.23 (0.17–0.30) | 0.48 (0.40–0.58) | 2.36 (1.90–2.89) | 2.97 (1.63–4.94) |
| Normal (21–29) | 0.36 (0.04–1.28) | 1.50 (1.24–1.80) | 3.12 (2.80–3.46) | 7.21 (6.34–8.15) | 8.77 (6.96–10.87) |
| Frail (30–39) | 9.46 (5.27–15.36) | 8.62 (7.09–10.36) | 12.79 (11.58–14.07) | 10.79 (9.27–12.47) | 10.97 (6.52–16.98) |
| Very Frail (≥40) | 11.11 (1.38–34.71) | 26.02 (18.52–34.70) | 25.57 (21.07–30.50) | 36.42 (28.75–44.64) | 0.00(0.00–19.51) |
| Overall Mortality | 0.79 (0.49–1.23) | 0.98 (0.87–1.09) | 2.36 (2.21–2.52) | 6.21 (5.71–6.74) | 7.08 (5.83–8.49) |
| 180-day Deaths, No. | 26 | 434 | 1186 | 677 | 160 |
| Mortality by RAI, % (95% CI) | |||||
| Robust (≤20) | 0.17 (0.03–0.49) | 0.35 (0.27–0.43) | 0.67 (0.57–0.78) | 2.83 (2.33–3.41) | 5.31 (3.46–7.74) |
| Normal (21–29) | 0.53 (0.11–1.55) | 2.15 (1.84–2.50) | 4.12 (3.76–4.51) | 8.78 (7.83–9.81) | 12.28 (10.16–14.67) |
| Frail (30–39) | 12.16 (7.37–18.54) | 12.55 (10.73–14.57) | 16.08 (14.75–17.48) | 14.64 (12.89–16.52) | 18.06 (12.35–25.04) |
| Very Frail (≥40) | 11.11 (1.38–34.71) | 34.96 (26.58–44.08) | 31.03 (26.21–36.19) | 42.38 (34.39–50.68) | 11.76 (1.46–36.44) |
| Overall Mortality | 1.03 (0.68–1.51) | 1.41 (1.28–1.55) | 3.06 (2.89–3.23) | 7.77 (7.22–8.35) | 10.68 (9.16–12.36) |
Abbreviations: CI, Confidence Interval; OSS, Operative Stress Score; RAI, Risk Analysis Index
Graham-Mengersen-Morton tests were used to calculate 95% confidence intervals.