Table 1 Summary of demographic data for patients included in this study

Mean age at surgery, yrs. (range)

72.3 (29–89)

Gender, female/male

102/9

Disease, OA/RA/ON

112/7/3

Mean height at surgery (range)

153 (136–173)

Mean weight at surgery (range)

63.4 (33.9–97.5)

Mean BMI at surgery (range)

27.2 (16.7–39.6)

Mean preoperative standing FTA, degree (range)

185 (152–209)

Mean preoperative HKA angle (range)

11.2 (−20 to 35)

Mean operation time, min (range)

125 (89–185)

Patellar replacement, yes/no

80/42