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Table 3 Predefined hypotheses and the confirmation or rejection of the hypotheses for hip OA (n = 117) and knee OA (n = 284)

From: The Dutch Lower Extremity Functional Scale was highly reliable, valid and responsive in individuals with hip/knee osteoarthritis: a validation study

 

Hip OA

Knee OA

There is a moderate correlation (r > 0.6) between LEFS scores and HOOS/KOOS-PF subscale.

Yes

Yes

The correlation between the LEFS and the HOOS/KOOS-PF subscale is higher than the correlation between the LEFS and the other subscales of the HOOS/KOOS.

Yes

Yes

The correlation between LEFS and HADS scores is low (r < 0.5).

Yes

Yes

The correlation between LEFS and CIS scores is low (r < 0.5).

No

Yes

Patients with multiple painful lower limb joints demonstrate lower LEFS scores than patients with pain in a single joint.

Yes

Yes

Patients with complaints less than 5 years demonstrate higher LEFS scores than patients with complaints over 5 years.

Yes

No

The participants’ education level (primary, secondary or higher education) does not influence the LEFS scores.

Yes

No

Sociodemographic characteristics, such as sex, doing volunteer work, income, type of health insurance, and family status, are unrelated (r < 0.2) to the LEFS score:

Yes

Yes

 

7/8 (88%)

6/8 (75%)

  1. Abbreviations: CIS = Checklist Individuals Strength, HADS = Hospital Anxiety and Depression Questionnaire, HOOS = Hip Osteoarthritis and Outcome Score, KOOS = Knee Osteoarthritis and Outcome Score, LEFS = Lower Extremity Functional Scale, OA = osteoarthritis, PF = physical function.