Risk factors | No. of patients | % percentage | Recurrent patients | p value |
- Age ・ <40 ・ 40 - 50 ・ 50 - 60 ・ >60 |
4 8 20 50 |
4.9 9.7 24.4 61 |
- - - 6 |
0.246 |
- Diabetes mellitus (D.M) | 20 | 24.4 | 4 | 0.027* |
- Hypertension | 28 | 34.1 | 6 | 0.021* |
- Liver disease | 4 | 4.9 | - |
|
- Prothrombin time > 14 sec. | 6 | 7.3 | 2 | 0.025* |
- Prothrombin Conc. <70% | 6 | 7.3 | 2 | 0.029* |
- Hb level < 10 mg/Dl | 6 | 7.3 | - |
|
- Internal architecture of SDH: ・ Homogenous ・ Laminar ・ Separated ・ Trabecular |
42 14 10 16 |
51.2 17.1 12.2 19.5 |
- - 2 4 |
0.044* 0.025* |
- SD hematoma thickness: ・ 10 - 20 mm ・ >20 mm |
14 68 |
17.1 82.9 |
- 6 |
0.034* |
- Number of burr-holes: ・ 1 burr-hole ・ 2 burr holes |
10 72 |
12.2 87.8 |
- 6 |
0.633 |
- Position of drain: ・ Subgleal (Sg) ・ Subdural (Sd) |
62 20 |
75.6 24.4 |
4 2 |
0.599 |
- Duration of drainage: ・ Less than 3 days ・ 3 days or more |
28 54 |
34.1 65.9 |
- 6 |
0.052 |
- Amount of drainage: ・ Less than 100 cc ・ 100cc- ・ 200cc- ・ More than 300 cc |
2 36 32 12 |
2.4 43.9 39 14.6 |
- 4 2 - |
0.821 0.596
|
- Postoperative residual hematoma on follow up CT Brain |
9 |
10.9 |
4 |
0.005* |