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Incidence of DVT in the four groups based on risk level.
| Group Risk level | A | B | C | D | Overall |
|---|---|---|---|---|---|
| Moderate | 3/102 (2.9%) | 1/113 (0.9%) | 2/95 (2.1%) | 3/101 (3.0%) | 9/411 (2.2%)# |
| High | 2/35 (5.7%) | 2/31 (6.5%) | 2/34 (5.9%) | 1/33 (3.0%) | 7/133 (5.3%)# |
| Very high | 9/22 (40.9%) | 3/13 (23.1%) | 4/24 (16.7%) | 0/22 (0%)** | 16/81 (19.8%)# |
| Overall | 14/159 (8.8%) | 6/157 (3.8%) | 8/153 (5.2%) | 4/156 (2.6%)* | 32/625 (5.1%) |
Note: *P < 0.05 vs. group A; #P < 0.01 among the three risk groups; **P < 0.01 vs. group A.
