Table 5 Details for the (a) Timed Up and Go Test (TUGT) (b) 30-s Chair Stand Test (CST), (c) Numeric Pain Rating Scale (NPRS)

TUGT

Pre-operation (in seconds)

D0 post-op

(in seconds)

D/C from PT

(in seconds)

Same-stage

13.78 (SD 8.09)

48.45 (SD 17.48)

10.57 (SD 2.78)

Two-stage 1st knee

14.40 (SD 5.77)

44.14 (SD 21.23)

14.91 (SD 5.19)

Two-stage 2nd knee

13.28 (SD 6.10)

37.02 (SD 24.45)

11.73 (SD 3.02)

ANOVA^a P value

0.112

0.005

0.003

 Same-stage vs 1st knee

–

0.437

<  0.001

 Same-stage vs 2nd knee

–

0.003

0.003

 1st knee vs 2nd knee

0.141

<  0.001

CST

Pre-operation

(no. of cycles)

D0 post-op

(no. of cycles)

D/C from PT

(no. of cycles)

Same-stage

11.64 (SD 4.72)

0.48 (SD 1.52)

11.86 (SD 3.27)

Two-stage 1st knee

10.03 (SD 3.20)

3.69 (SD 3.71)

10.88 (SD 3.06)

Two-stage 2nd knee

11.28 (SD 2.79)

4.69 (SD 4.00)

12.08 (SD 2.96)

ANOVA^a P value

0.006

< 0.001

0.067

 Same-stage vs 1st knee

0.001

< 0.001

–

 Same-stage vs 2nd knee

0.344

0.001

–

 1st knee vs 2nd knee

0.297

0.289

–

NPRS

Pre-operation

(score 0–10)

D0 post-op

(score 0–10)

D/C from PT

(score 0–10)

Same-stage

7.69 (SD 1.48)

4.74 (SD 1.60)

0.19 (SD 0.83)

Two-stage 1st knee

6.08 (SD 1.85)

4.46 (SD 2.07)

1.44 (SD 1.51)

Two-stage 2nd knee

6.34 (SD 2.15)

5.00 (SD 1.88)

0.48 (SD 0.97)

ANOVA^a P value

< 0.001

0.261

<  0.001

 Same-stage vs 1st knee

< 0.001

–

0.001

 Same-stage vs 2nd knee

0.001

–

0.003

 1st knee vs 2nd knee

0.820

–

<  0.001