Table 2. Characteristics of the sample included in this study and lambda 2 values for the subscales included in the Confirmatory Factor Analysis.
| Total hip arthroplasty (N = 182) mean (SD)/ % | Total knee arthroplasty (N = 179) mean (SD)/% | Total sampleN = 361 Mean (SD)/% | Gutmann’s lambda 2 for the total sample | |
|---|---|---|---|---|
| Gender % female | 58.1% | 71.6% | 64.8% | - |
| Age | 67.1 (9.9)) | 67.6 (9.3) | 67.4 (9.6) | - |
| Education level | - | |||
| Low | 33.7% | 50.3% | 42.0% | |
| Medium | 32.0% | 31.2% | 31.6% | |
| High | 34.3% | 18.5% | 26.4% | |
| BMI | 27.5 (4.7) | 29.5 (4.8) | 28.5 (4.9) | - |
| SF-36 Physical summary scale (range 0–100) | 38.8 (7.1) | 39.1 (7.7) | 38.9 (7.4) | - |
| Sf-36 Mental summary scale (range 0–100) | 51.8 (10.7) | 52.2 (11.2) | 52.0 (10.9) | - |
| HOOS/KOOS* pain (range 0–100) | 41.9 (17.8) | 39.7 (16.7) | 40.6 (17.2) | - |
| HOOS/KOOS* Activities of Daily Living (range 0–100) | 43.8 (17.6) | 45.6 (17.6) | 44.7 (17.5) | - |
| CEQ Credibility (range 3–27) | 23.7 (3.0) | 23.5 (3.1) | 23.6 (3.1) | 0.714 |
| CEQ Expectancy (range 3–27) | 22.5 (3.0) | 22.1 (3.0) | 22.3 (3.0) | 0.779 |
| HS Hope (range 8–64) | 43.2 (11.6) | 41.3 (11.8) | 42.2 (11.7) | 0.941 |
| LOT-R Optimism (range 3–15) | 9.9 (2.9) | 10.0 (2.8) | 9.9 (2.8) | 0.834 |
| LOT-R Pessimism, reverse scored (range 3–15) | 10.8 (2.8) | 10.4 (2.7) | 10.6 (2.8) | 0.709 |
*The THA patients completed the HOOS questionnaire and the TKA patients completed the KOOS questionnaire.
HOOS = the Hip injury and Osteoarthris Outcome Score, KOOS = the Knee injury and Osteoarthritis Outcome Score, CEQ = Credibility Expectancy Questionnaire, HS = Hope Scale, LOT-R = Life Orientation Test Revised.