Table 1

Characteristics of Clinical Practice Research Datalink-recorded cases of total knee replacement and matched controls

CasesControlsP value
Total (n)49 723104 353
Body mass index (SD)28.68 (4.93)25.83 (4.58)P<0.001
Prior diagnosis of ACL injury153 (0.31%)41 (0.04%)P<0.001
Prior diagnosis of meniscal injury4217 (8.48%)669 (0.64)P<0.001
Prior fracture around the knee11 328 (22.78%)17 779 (17.04%)P<0.001