Table 4 Secondary and tertiary outcome measures

 Activity performance

MAP-Hand, mean of 18 standardized and up to five patient specific activities, respectively, rating scale 1–4, 1 is no problems

t1, t2*, t3, t4, t5

 Physical function and symptoms in the arm, shoulder and hand

Quick-Dash, sum-score range 1–100, 1 = good function

t1, t3, t4, t5

 Current situation with regards to main reason for wanting surgery

Numeric rating scale: 0–10, 0 is as bad as could be

t1, t3, t4, t5

 Pain at rest

Numeric rating scale: 0–10, 0 is no pain. Both hands.

t1, t3, t4, t5

 Grip strength

In Newton by the Grippit; maximum, mean and last of 20 recordings over a 10 s interval, both hands

t1, t3, t4, t5

 Pain following measure of grip strength

Numeric rating scale: 0–10, 0 is no pain, both hands

t1, t3, t4, t5

 Current pain in thumb selected for surgery

Numeric rating scale: 0–10, 0 is no pain

t1, t3, t4, t5

 Painful finger joints

Examination by a trained OT of presence of pain yes/no in CMC1, MCP, PIP and DIP-joints in both hands

t1, t3, t4, t5

 Finger flexion

Flexion deficit in millimetre of the II, III, IV and V finger of both hands

t1, t3, t4, t5

 Range of motion thumb MCP

In degrees by a goniometer, both hands

t1, t3, t4, t5

 Range of motion thumb IP

In degrees by a goniometer, both hands

t1, t3, t4, t5

 Palmar abduction thumb

In degrees by a pollexograph, both hands

t1, t3, t4, t5

 Abduction CMC1

In degrees by a pollexograph, both hands

t1, t3, t4, t5

 Pinch strength

In Newton by the Grippit; maximum, mean and last of 20 recordings over a 10 s interval, both hands

t1, t3, t4, t5

 Pain following measure of pinch strength

Numeric rating scale: 0–10, 0 is no pain, both hands

t1, t3, t4, t5

 Pain following exercising

Exercise diary, numeric rating scale: 0–10, 0 is no pain

t3

 Satisfaction with HOA care at current centre

Numeric rating scale: 0–10, 0 is very dissatisfied

t3, t4, t5