Table 1.
Characteristics of patients who underwent burr hole drainage for chronic subdural hematoma
| BHDI group(n = 88) | BHD group(n = 63) | Total (n = 151) | Test value | P | |
|---|---|---|---|---|---|
| Age(years) | 65.5 ± 7.8 | 64.5 ± 5.6 | 65.1 ± 7.0 | t = 0.843 | 0.401 |
| Gender | χ2 = 0.652 | 0.419 | |||
| Male (%) | 53(60.2) | 42(66.7) | 95(62.9) | ||
| Female (%) | 35(39.8) | 21(33.3) | 56(37.1) | ||
| Affected side | χ2 = 1.125 | 0.289 | |||
| Left (%) | 44(50.0) | 37(58.7) | 81(53.6) | ||
| Right (%) | 44(50.0) | 13(41.3) | 70(46.4) | ||
| Concomitant diseases | |||||
| Hypertension (%) | 18(20.5) | 13(20.6) | 31(20.5) | χ2 = 0.001 | 0.978 |
| Organic heart disease (%) | 13(14.8) | 12(19.0) | 25(16.6) | χ2 = 0.486 | 0.486 |
| Diabetes (%) | 11(12.5) | 10(15.9) | 21(13.9) | χ2 = 0.349 | 0.555 |
| Preoperative hematoma volumes (ml) | 51.42 ± 9.91 | 52.23 ± 10.21 | 51.76 ± 10.00 | t = 0.494 | 0.622 |
BHDI burr hole drainage with irrigation, BHD burr hole drainage without irrigation