Table III.

Percentages of scores reaching the ceiling (top score).

Score	Robotic arm-assisted, %	Manual, %	p-value*
OKS
Preoperative	0.0	0.0	N/A
Three months	9.5	9.2	0.954
Year one	27.0	25.4	0.839
Year two	36.2	27.3	0.312
Year five	27.3	26.5	0.927
AKSS Knee score
Preoperative	0.0	0.0	N/A
Three months	0.0	0.0	N/A
Year one	1.6	0.0	0.325
Year two	1.8	1.9	0.969
Year five	0.0	0.0	N/A
AKSS Function score
Preoperative	1.6	0.0	0.310
Three months	15.9	10.8	0.397
Year one	31.7	23.8	0.322
Year two	25.9	23.6	0.786
Year five	23.6	22.4	0.887
Total AKSS
Preoperative	0.0	0.0	N/A
Three months	0.0	0.0	N/A
Year one	1.6	0.0	0.324
Year two	0.0	0.0	N/A
Year five	0.0	0.0	N/A

Percentages over 15% are considered significant. Subgroup statistical analysis between treatment groups showed no differences.

^*Proportional chi-squared test.

AKSS, American Knee Society Score; N/A, not applicable; OKS, Oxford Knee Score.