Predictions of the Length of Lumbar Puncture Needles

Table 3

Pearson correlation coefficients between factors and depths.

	Posterior margins	Median	Anterior margins
L4-L5
Age	−0.087	−0.108*	−0.127*
Height	0.115	0.136*	0.154*
Weight	0.596*	0.610*	0.609*
BMI	0.653	0.656	0.643
	0.650*	0.659*	0.653*
L3-L4
Age	−0.100	−0.115*	−0.129*
Height	0.179*	0.182*	0.181*
Weight	0.663*	0.667*	0.658*
BMI	0.692	0.695	0.684
	0.707*	0.711*	0.700*
Men
L4-L5
Weight	0.675*	0.697*	0.703*
BMI	0.689*	0.703*	0.713*
	0.685*	0.691*	0.705*
L3-L4
Weight	0.710*	0.732*	0.738*
BMI	0.719*	0.737*	0.746*
	0.713*	0.724*	0.737*
Women
L4-L5
Weight	0.648*	0.609*	0.650*
BMI	0.657*	0.608*	0.654*
	0.654*	0.595*	0.646*
L3-L4
Weight	0.694*	0.646*	0.693*
BMI	0.690*	0.648*	0.691*
	0.672*	0.637*	0.677*

⁺Ratio of weight to height; value < 0.05.