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Table 3: Subsequent fracture incidence stratified
Subsequent Fractures Cortoss PMMA
Adjacent Non-Adjacent Adjacent Non-Adjacent
No. (%) of patients with ≥1 Fx 30 (18.5%) 26 (16.0%) 19 (20.2%) 16 (17.0%)
No. (%) of first-time patients with Fx^{^a} 7 (10.3%) 6 (8.8%) 8 (18.2%) 6 (13.6%)
% Difference C < P 43.4% 35.3% 
Note:—Fx indicates fracture; C, Cortoss; P, PMMA.
↵a Patients originally treated at 1 level with no previous fractures: C = 68, P = 44.