Table 3.

Prediction model for claudication distance and total walking distance in intermittent claudication patients.

Variables	Prediction model	r (r2)	SEE
CD (m)	=  −21.535 + (Q4×25.351) + (Q1×31.484) + (Q9×27.146) - (diabetes presence x 47.909)a	0.52 (0.27)	134
TWD (m)	=  109.251 + (Q4×78.825) + (Q1×69.756) - (diabetes presence x 116.255) - (coronary artery disease presence x 98.725)b	0.58 (0.34)	242

CD – claudication distance; TWD – total walking distance; ^a F₄ = 16.66, p<0.001; ^b F₄ = 12.07, p<0.001; r - multiple correlation coefficient, r² - variance; SEE - standard estimate of the error; Q – question of Walking Impairment Questionnaire.