Table 2 Outcome of two procedures treating chronic subdural hematoma

Pneumocrania *(ml)

9.05 ± 3.50

4.85 ± 2.35

t = 8.266

Residual hematoma*(ml)

10.76 ± 3.19

11.68 ± 4.10

t = 1.541

Rebleeding (%)

11(12.5)

2(3.2)

χ² = 2.959

Recurrence (%)

6(6.8)

5(7.9)

χ² = 0.068

Epilepsy (%)

3(3.4)

2(3.2)

χ² = 0.006

Infection (%)

1(1.1)

1(1.6)

χ² = 0.057