Table 2 Comparison of the observed value and the expected value
From: Risk assessment and decision-making for patients undergoing orthopedic surgery
Expected rate % | Cases | The average expected rate (%) | The number of expected cases | The number of observed cases | OE ratio |
|---|---|---|---|---|---|
0–10 | 163 | 7.67 | 12 | 2 | 0.17 |
10–20 | 199 | 14.6 | 29 | 9 | 0.31 |
20–30 | 125 | 24.2 | 30 | 8 | 0.27 |
30–40 | 103 | 35.0 | 36 | 15 | 0.42 |
40–50 | 84 | 44.0 | 37 | 8 | 0.22 |
50–60 | 48 | 54.6 | 26 | 8 | 0.31 |
60–70 | 31 | 65.0 | 20 | 8 | 0.40 |
70–80 | 13 | 74.5 | 10 | 5 | 0.50 |
80–90 | 9 | 83.0 | 7 | 2 | 0.29 |
90–100 | 4 | 94.0 | 4 | 0 | 0 |