Table 2.

Summary of data pertaining to lower-extremity limb lengthenings with the ISKD

Variable	Femurs (n = 26)	Tibias (n = 9)	p value
Distraction index (mm/day)*	1.5 ± 0.6 (0.6–3.8)	0.9 ± 0.2 (0.4–1.3)
Consolidation index (1 cortex) (days/cm)*	14 ± 6 (6–35)	26 ± 14 (15–51)	0.002
Consolidation index (3 cortices) (days/cm)*	17 ± 11 (8–35)	36 ± 8 (32–97)	< 0.001
Nail group (number of nails)
Normal nails	9 (35%)	5 (56%)	0.48
Problematic nails	17 (65%)	4 (44%)	0.43
Runaway nails	6 (23%)	0 (0%)
Difficult-to-distract nails	8 (31%)	4 (44%)
Nondistracting nails	3 (12%)	0 (0 %)

* Values are expressed as mean ± SD, with range in parentheses.