Table 2. Fiber diameters measured from scanning electron micrographs.

We measured fibrin fiber diameters in four separate experiments (2–5 images acquired per clot and ~100 fibers measured per clot). Because of variability in the control samples (see Results), we determined the percent difference from the appropriate control for each fiber measured. The average difference ± standard error of the mean for each %RBCs is shown. P-values were obtained for comparison of these difference values with those from the 0% RBC control sample using an independent Student’s t-test.

% RBCs	% Difference from control diameter	P-value
0%	0% ± 1%	-
2%	11% ± 2%	0.006
10%	17% ± 3%	0.008
20%	20% ± 6%	0.048