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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.