Table 2 Detail of variables and times for evaluation of outcomes

Time point

Enrolment

BL

BP

AI

12 m

 Eligibility screen

x

 Informed consent

x

 Randomization

x

Assessments

 Demographic and biomedical

x

Primary

 Self-reported functionality

KOOS

x

x

x

x

 Balance (overall)

Berg Balance Scale

x

x

x

x

Secondary

 Function

ROM (flexion)

x

x

x

x

ROM (extension)

x

x

x

x

Strength

x

x

x

x

 Balance (dynamic)

Timed Up & Go

x

x

x

x

 (static)

One-leg Stand

x

x

x

x

 (stability)

Functional Reach

x

x

x

x

 Quality of Life

EuroQoL

x

x

x

 Anxiety

EuroQoL(5D)

x

x

x

Cost-effectiveness

Qaly

x

Patient expectations

x

x

x

Interventions

BL

BP

AI

12 m

 Non-active comparator

 In-hospital preoperative

 In-home preoperative