Table 5

Multivariate linear regression models for predicting true CSF WBC count and glucose

Outcome	For CSF analysis done at	Predictor variables	Regression coefficient	95% CI of coefficient	Predictor variable p value	Adjusted R² of model (%)	Model p value
Half hour CSF WBC count	2 h	2-h CSF WBC count	1.17	1.14 to 1.20	<0.001	99.3	<0.001
		CSF protein (mg/dl)	0.02	0.006 to 0.03	0.004
	4 h	4-h CSF WBC count	1.3	1.26 to 1.35	<0.001	98.8	<0.001
		CSF protein (mg/dl)	0.05	0.03 to 0.06	<0.001
Half hour CSF glucose	2 h	Constant	3.03	1.27 to 4.79	0.001	97.6	<0.001
		2-h CSF glucose (mg/dl)	0.99	0.95 to 1.03	<0.001
	4 h	Constant	5.4	3.58 to 7.24	<0.001	97.2	<0.001
		4-h CSF glucose (mg/dl)	0.98	0.93 to 1.02	<0.001

CSF, cerebrospinal fluid; WBC, white blood cell.