Spatial frequency analysis detects altered tissue organization following hamstring strain injury at time of injury but not return to sport

Table 3 Within-image difference of injured limb by time point for peak spatial frequency radius and Mmax%

	Time point relative to injury	Within-image difference^†	P-value ^‡ [95% Confidence Interval]
PSFR difference (mm⁻¹)	Time of injury	0.15 [0.03, 0.25]	p = 0.03 [0.02, 0.31]
PSFR difference (mm⁻¹)	Return to sport	0.05 [− 0.13, 0.07]	p = 0.03 [0.02, 0.31]
Mmax% difference (%)	Time of injury	0.71 [0.64, 0.98]	p = 0.04 [0.16, 1.17]
Mmax% difference (%)	Return to sport	0.31 [− 0.22, 0.49]	p = 0.04 [0.16, 1.17]

^†Data are presented as median [interquartile range]. Within-image difference was calculated as \(Healthy-Injury\)
^‡P-values derived from separate two-sided Wilcoxon rank sum tests
PSFR peak spatial frequency radius

ISSN: 1471-2342