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Table 2 Factor loading items for the one-factor solution, average score and discrimination indices of items

From: Validation of a Spanish version of the Spine Functional Index

Question

Item

Factor loading

Item average score

Item discr indices

1

Stay at home most of time

,586

,09

,628(**)

2

Change positions frequently

,293

,66

,314(**)

3

Avoid heavy jobs

,314

,67

,336(**)

4

Rest more often

,521

,29

,559(**)

5

Get others to do things

,323

,07

,346(**)

6

Pain almost all the time

,570

,38

,610(**)

7

Lifting and carrying

,379

,59

,407(**)

8

Appetite affected

,127

,04

,136

9

Walking/normal recreation/sport

,512

,38

,549(**)

10

Home/family duties and chores

,604

,16

,647(**)

11

Sleep less well

,538

,37

,577(**)

12

Assistance with personal care, hygiene

,296

,02

,318(**)

13

Regular daily activity work/social

,602

,20

,318(**)

14

More irritable/bad tempered

,370

,25

,645(**)

15

Feel weaker or stiffer

,442

,44

,396(**)

16

Transport independence

,401

,06

,474(**)

17

I require assistance or am slower with dressing

,518

,13

,429(**)

18

I have difficulty moving in bed

,500

,14

,555(**)

19

I have difficulty concentrating and / or reading

,233

,21

,536(**)

20

My sitting is affected

,459

,14

,250(**)

21

I have difficulty getting in and out of chairs

,414

,35

,492(**)

22

I only stand for short periods of time

,256

,39

,443(**)

23

I have difficulty squatting and / or kneeling down

,472

,38

,275(**)

24

I have trouble reaching down (e.g. pick-up things, put on socks)

,430

,35

,506(**)

25

I go up stairs slower or use a rail

,538

,29

,461(**)

  1. Symbol ** =significance values p<0.05.