TABLE 4:

Differences of packing densities in subgroups according to percentage length of PGLA coils

% Length	n	Mean Packing Density	P*
<25	5	19.0 ± 4.5	NA
	21	30.1 ± 11.7	.0118
	17	34.5 ± 15.1	.0293
	13	32.9 − 13.9	.0093

^*Mann–Whitney U-test, compared with the first group (ie, % length <25).