Table 4.

Results of forward stepwise multiple linear regression (FSMR) analyses to predict initial deficits and recovery of function with independent variables: total gray matter lesion volume (TGMLV) and total white matter lesion volume (TWMLV). The positive or negative superscript by the variable indicates whether the relationship is as expected (i.e., ⁺larger lesion volume associated with larger initial deficits and poorer recovery) or opposite to expected (i.e., −larger lesion volume associated with smaller initial deficits and better recovery). The analyses were included in this table only if the analysis for the primary independent variable or the final regression model was statistically significant (p < 0.05). Collinearity analyses of the 2 predictor variables indicated a VIF of 2.37 and tolerance of 0.43

Dependent Variable	Primary Independent Variablea (R2, p)	Additional Independent Variableb (R2, R2adj, p)
mDB 1st attc AWd	TWMLV+ (0.73,<0.001)	TGMLV− (0.89, 0.87, <0.001)
mMAP 1st att CRe	TWMLV+ (0.70,<0.001)
mDB 1st succf BWg	TWMLV+ (0.55,0.003)
mMAP 1st succ CR	TWMLV+ (0.64,0.002)
mMAP 1st succ SRh	TWMLV+ (0.5,0.010)
mDB Csucci AW	TWMLV+ (0.36,0.030)
mMAP Csucc CR	TWMLV+ (0.58,0.004)	TGMLV− (0.63, 0.55, 0.012)
mMAP Csucc SR	TWMLV+ (0.64, <0.001)	TGMLV− (0.74,0.68,0.005)
mMAP Csucc FSj	TWMLV+ (0.56,0.008)
mDB Rchj Idef l BW	TWMLV+ (0.53,0.005)	TGMLV− (0.59, 0.51, 0.012)
mDB Manm Idef W2n	TWMLV+ (0.62,0.001)
mMAP Man Idef CR	TWMLV+ (0.59,0.035)
mDB Rch Skilln BW	TWMLV+ (0.48,0.008)
mDB Rch Skill W2	TGMLV+ (0.36,0.031)
mMAP Man Skill CR	TWMLV+ (0.55,0.003)

Abbreviations:

^aFirst variable added to FSMR,

^badditional independent variables included in final FSMR model,

^cattempt,

^dany well of mDB task,

^ecurved rod mMAP task,

^fsuccessful acquisition of food target,

^gbest well of mDB task,

^hstraight rod mMAP task,

ⁱsuccessful acquisition of target on all 5 trials of a single well of mDB or level of mMAP in the testing session,

^jflat surface mMAP task,

^kReach,

^lIdef - ratio of performance scores in the 1^st post-lesion month to those of last 5 pre-lesion tests,

^mMan - manipulation,

ⁿ2^nd (smaller) well of mDB task,

^oratio of highest skill during post-lesion period to skill during last 5 pre-lesion tests.