TABLE III.

Lower-Limb Rodded Bones per OI Type

OI Type	No. of Rodded Bones	Femora		Tibiae		Mean No. of Rodded Bones per Patient (Range)
		% Rodded	Mean Age of Rodding (yr)	% Rodded	Mean Age of Rodding (yr)
Type I	43	76.7%	6.7	23.3%	8.4	0.2 (0 to 4)
Type III	254	53.9%	4.1	46.1%	5.5	2.3 (0 to 4)*
Type IV	396	61.5%	7.5	38.5%	9.0	1.9 (0 to 4)*
Type V	19	31.6%	9.8	68.4%	8.8	1.0 (0 to 3)*
Type VI	25	72.0%	4.2	28.0%	8.8	2.1 (0 to 4)*
Type VII	8	50%	9.4	50%	10.2	1.6 (0 to 4)†
Unclassified	34	55.9%	5.1	44.1%	6.1	2.1 (0 to 4)*

^*Significant at p ≤ 0.01 (Mann-Whitney test for the mean number of rodded bones per patient compared with OI Type I).

^†Significant at p ≤ 0.01 (t test for the mean number of rodded bones per patient compared with OI Type I).