Table 2.

Comparison of mean T-and Z-scores stratified by DXA measurement site between the periprosthetic fracture cohort and the two control cohorts

DXA measurement site mean (± SD)	PPF n = 40	AR n = 40	OA n = 40	p-value (PPF vs. AR)	p-value (PPF vs. OA)
Lumbar spine (n)	35	35	35
T-score	− 1.09 (± 1.78)	− 0.12 (± 1.77)	− 0.37 (± 1.29)	0.022	0.087
Z-score	− 0.03 (± 1.78)	0.80 (± 1.70)	0.54 (± 1.32)	0.049	0.190
Total hip (n)	26	26	26
T-score	− 1.74 (± 1.92)	− 0.76 (± 1.30)	− 0.79 (± 1.13)	0.023	0.023
Z-score	− 0.61 (± 1.70)	0.19 (± 1.37)	0.25 (± 0.94)	0.035	0.029

Bold indicates significant differences

DXA dual-energy X-ray absorptiometry, PPF periprosthetic fracture, AR aseptic revision, OA osteoarthritis