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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).
% 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