Table 4.

Correction of Blount’s disease achieved by the MAC system radiographically (MAD, TFA, MPTA, and PPTA)

Radiographic parameter	Mean change (pre-operative to fixator removal)	P value	Mean change (pre-operative to final follow-up)	P value
Mechanical axis deviation (mm)	−40.2 (29.3); 95% CI (−22.5 to −58.0)	≤0.001*	−54.3 (30.7); 95% CI (−22.1 to −86.6)	0.025*
Tibial–femoral angle (degree)	15.9a (13.7); 95% CI (9.1–22.7)	≤0.001*	13.8a (9.6); 95% CI (3.7–23.9)	0.01*
Medial proximal tibial angle (degree)	15.7 (14.6); 95% CI (8.0–23.4)	0.001*	19.8 (12.6); 95% CI (6.6–33.0)	0.01*
Posterior proximal tibial angle (degree)	−6.7 (14.8); 95% CI (−19.0 to 5.7)	0.24	−3.7 (18.0); 95% CI (−48.4 to 41.1)	0.56

SD in parentheses

* Statistically significant

^aDecrease in varus angulation