Table 2.

Correlations of individual variables with IBB score.

Variable	r (all subjects)	r2 (all subjects)	r (no shams)	r2 (no shams)
Actual force	−0.96	0.93	−0.75	0.56
Tissue displacement	−0.83	0.70	−0.09	0.01
Abnormal paw PL	−0.87	0.75	−0.69	0.48
Grooming	0.85	0.73	0.47	0.22
Forelimb open field	0.66	0.43	0.67	0.45
LF step distribution	−0.21	0.04	−0.31	0.10
LF stride length	0.07	0.00	0.34	0.12
LF print area	0.32	0.10	0.42	0.17
RF step distribution	−0.55	0.31	−0.27	0.08
RF stride length	0.37	0.14	0.67	0.45
RF print area	0.29	0.09	0.03	0.00
Total sparing	0.93	0.87	0.55	0.30
WM sparing	0.89	0.79	0.61	0.37
GM sparing	0.88	0.77	0.06	0.00
Motorneuron sparing	0.68	0.46	0.27	0.07

Note that separate correlations were calculated for all injury conditions (all subjects) and excluding shams (no shams). Note that Pearson correlations (r) and shared variance (r²) deflated without shams, indicating a smaller but often still significant dynamic range within different injury conditions. This suggests that the IBB has sensitivity across a wide dynamic range of injury conditions. Note: r_crit = 0.31 for p < 0.05.