Table 2. Migration Speeds for NK Cells.

Table 2-1. Preparations treated with SDF-1α.
	Median	95% CI	N
Control	2.94	2.62–3.11	314
HS1-depleted	2.34	2.22–2.55	272
Non-parametric p values
Kolmogorov-Smirnov test		0.0051
Mann-Whitney test		0.0065

Speed (μm/min) defined as total displacement (path length) divided by time for control vs HS1-depleted cells. The distributions are not Gaussian, so the values listed are median, 95% confidence interval of the median and number of data points (N). P values from two non-parametric tests of significance are listed. Data include tracks for all cells in separate experiments on three different days.