Table 1.

Underlying diagnoses leading to end-stage knee arthritis

Underlying diagnosis	Number (%)
	Fracture group	Sample population
Osteoarthritis	39 (57.3%)	14,654 (84.2%)
Posttraumatic arthritis	8 (11.76%)	1195 (6.88%)
Rheumatoid arthritis	8 (11.76%)	640 (3.69%)
Osteonecrosis	3 (4.41%)	409 (2.36%)
Prior arthrodesis	2 (2.9%)	37 (0.21%)
Juvenile rheumatoid arthritis	2 (2.9%)	44 (0.25%)
Charcot arthropathy	1 (1.5%)	5 (0.028%)
Dwarfism: Morquio’s syndrome	1 (1.5%)	4 (0.023%)
Failed prior surgery: osteotomy	1 (1.5%)	3 (0.017%)
Osteogenesis imperfecta	1 (1.5%)	3 (0.017%)
Psoriatic arthritis	1 (1.5%)	24 (0.14%)
Systemic lupus erythematosus	1 (1.5%)	3 (0.017%)