Impact of depression on functional status in elderly patients undergoing total knee arthroplasty

Table 2 Variation between pre and postoperative functional status in patients with depression and without depression

Variable	Total (n = 90)	With depression (n = 21)	Without depression (n = 69)	P value
Postoperative Functional KSS	66 ± 20.6	65 ± 22.1	66.3 ± 20.3	0.8
Postoperative Knee KSS	78 ± 13	78.9 ± 10.4	78.4 ± 13.7	0.9
Delta Functional KSS	34.4 ± 23.7	33.8 ± 27.2	34.5 ± 22.7	0.9
Delta Knee KSS	46.1 ± 19.6	50.2 ± 19.5	44.9 ± 19.5	0.3

Values are expressed as means ± SD. KSS: Knee Society Score.