Table 2 Factor loading items for the one-factor solution, average score and discrimination indices of items (n = 136)

1

Stay at home most of time

.780

.25

.259^*

2

Change positions frequently

.703

.38

.811^**

3

Avoid heavy jobs

.466

.75

.561^**

4

Rest more often

.691

.75

.388^*

5

Get others to do things

.726

.38

.656^**

6

Pain almost all the time

.690

.38

.822^**

7

Lifting and carrying

.735

.75

.561^*

8

Appetite affected

.740

.13

.334^*

9

Walking/normal recreation/sport

.796

.75

.561^**

10

Home/family duties and chores

.514

.38

.665^**

11

Sleep less well

.607

.38

.622^**

12

Assistance with personal care, hygiene

.706

.13

.690^**

13

Regular daily activity work/social

.601

.63

.811^**

14

More irritable/bad tempered

.497

.13

.776^**

15

Feel weaker or stiffer

.838

.25

.622^**

16

Transport independence

.687

.13

.863^**

17

Difficulty or need with dressing (e.g. trousers/pants/shoes and socks)

.849

.25

.480^*

18

Difficulty changing directions, twisting or turning.

.429

.25

.509^*

19

Unable to move as fast as I would wish.

.664

.50

.209^*

20

I have difficulty with prolonged or extended standing.

.658

.50

.863^**

21

Difficulty bending, squatting and/or reaching down.

.645

.63

.767^**

22

Difficulty with long or extended walks.

.249

.63

.523^*

23

Difficulty with steps and stairs.

.471

.88

.624^**

24

Difficulty with sitting for prolonged or extended times.

.620

.25

.782^**

25

Problems with my balance on uneven surfaces and / or with unaccustomed footwear.

.394

.63

.803^**