表 3. Intracranial pressure, cerebrospinal fluid SP100, and red blood cell count in the two groups after continuous drainage for 7 days ().

两组持续引流7 d后的颅内压、脑脊液SP100以及红细胞数量（）

Index	Group	n	Before treatment	After treatment	Before treatment－After treatment	t	P
1 mmH2O=0.009 8 kPa.
Intracranial pressur/mmH2O	Control	42	295.34±5.78	256.45±4.33	38.89±1.45	55.888	<0.001
	Observation	45	294.78±5.33	201.74±4.25	93.04±1.08	91.555	<0.001
	t/F		0.470	59.457	6.37
	P		0.639	<0.001	0.018
Cerebrospinal fluid SP100/(μg/L)	Control	42	0.88±0.14	0.85±0.13	0.03±0.01	1.141	0.256
	Observation	45	0.89±0.15	0.41±0.12	0.47±0.03	18.973	<0.001
	t/F		0.320	16.416	5.67
	P		0.749	<0.001	0.033
RBC/(×1006 L－1)	Control	42	1512.77±6.35	874.64±6.15	638.13±0.20	467.82	<0.001
	Observation	45	1513.15±6.24	779.25±6.05	733.90±0.19	566.440	<0.001
	t/F		0.281	72.905	6.99
	P		0.779	<0.001	<0.001