Table 2 Exploratory factor analysis of the Oxford Hip Score (OHS) items

Question: During the past 4 weeks…

Factor loading

Communality

During the past 4 weeks… How would you describe the pain you usually have from your hip? (OHS 1)

0.814

0.662

Have you had any trouble with washing and drying yourself (all over) because of your hip? (OHS 2)

0.791

0.626

Have you had any trouble getting in and out of a car or using public transport because of your hip? (OHS 3)

0.842

0.709

Have you been able to put on a pair of socks, stockings or tights? (OHS 4)

0.738

0.545

Could you do the household shopping on your own? (OHS 5)

0.797

0.635

For how long have you been able to walk before pain from your hip becomes severe? (OHS 6)

0.558

0.311

Have you been able to climb a flight of stairs? (OHS 7)

0.834

0.696

After a meal (sat at a table), how painful has it been for you to stand up from a chair because of your hip? (OHS 8)

0.810

0.656

Have you been limping when walking, because of your hip? (OHS 9)

0.698

0.488

Have you had any sudden, severe pain - ‘shooting’, ‘stabbing’ or ‘spasms’ - from the affected hip? (OHS 10)

0.630

0.396

How much has pain from your hip interfered with your usual work (including housework)? (OHS 11)

0.852

0.726

Have you been troubled by pain from your hip in bed at night? (OHS 12)

0.718

0.515