Table 2 Timelines established to assess time gap between 6-week visit and receipt of data

Randomisation

Randomisation

I

I

Surgery

Surgery

I

I

6 week follow-up visit

TIME GAP

TIME GAP

6 week follow-up visit

I

I

Data received

Data received

I

I

Data entered into a database

Data sent back for correction

I

Corrected data received

I

Data entered into a database