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Table 5 Comparison of observed post-operative mortality with GAS in the 3 largest studies

From: Pre-operative risk scores for the prediction of outcome in elderly people who require emergency surgery

GAS/Postoperative Mortality Rate by Age (years)
Korhonen41 n = 836 Samy12 n = 500 Samy40 n = 320
< 73 17% < 70 6% < 70 0%
74 – 82 35% 70 – 75 6% 70 – 75 2%
83 – 89 46% 76 – 85 16% 76 – 85 7%
90 – 97 61% > 85 35% 86 – 95 36%
> 98 76%    > 95 80%