TABLE III.

Multivariate Linear Regression Analysis of Callus Formation

	6 Wk		12 Wk		24 Wk
	Coefficient (95% CI)*	P Value	Coefficient (95% CI)*	P Value	Coefficient (95% CI)*	P Value
Open fracture	0.178 (−0.112 to 0.468)	0.224	0.154 (−0.113 to 0.422)	0.251	0.045 (−0.234 to 0.324)	0.747
Smoking	−0.131 (−0.402 to 0.140)	0.336	−0.190 (−0.446 to 0.067)	0.144	−0.145 (−0.416 to 0.126)	0.287
Diabetes	−0.148 (−0.440 to 0.144)	0.314	−0.090 (−0.356 to 0.176)	0.5	−0.030 (−0.311 to 0.251)	0.831
Longitudinal motion	0.080 (−0.504 to 0.665)	0.784	0.814 (0.149 to 1.479)	0.017†	0.813 (0.149 to 1.478)	0.017†
Shear	0.078 (−0.508 to 0.663)	0.792	−0.811 (−1.474 to −0.148)	0.017†	−0.784 (−1.449 to −0.118)	0.022†

^*The values are presented as the standardized regression coefficient. A positive value indicates that callus area increased with the presence or magnitude of the parameter, and a negative value indicates that the callus area decreased. The absolute magnitude of the coefficient reflected the magnitude of the effect. CI = confidence interval.

^†A significant association with callus formation.