| continue | 0.47 |
| save life | 0.44 |
| carry risk | 0.26 |
| take a few hours | 0.25 |
| safe | 0.52 |
| necessary | 0.50 |
| effective | 0.48 |
| unnecessary | 0.31 |
| successful | 0.31 |
| harmful | 0.28 |
| rare | 0.25 |
| insufficient | 0.16 |
| indicated | 0.51 |
| started | 0.50 |
| completed | 0.47 |
| stopped | 0.46 |
| associated with increas… | 0.38 |
| associated with increase | 0.32 |
| used to replace lost co… | 0.29 |
| associated with postope… | 0.25 |
| restarted | 0.25 |
| associated with longer … | 0.16 |
| supportive care | 0.29 |
| massive trauma | 0.29 |
| transplant surgery | 0.25 |