Table 2.
Baseline distribution of sf-12 and womac-index according to patients’ characteristics
| (n = 132) | SF 12-PCS | SF 12-MCS | WOMAC-Index | ||||
|---|---|---|---|---|---|---|---|
| N (%) | Mean ± SD | P | Mean ± SD | P | Mean ± SD | P | |
| Age | 0.318 | 0.900 | 0.925 | ||||
| < 65 years | 42 (31.8) | 34.4 ± 9.3 | 48.2 ± 12.4 | 45.9 ± 14.9 | |||
| ≥ 65 years | 90 (68.2) | 36.1 ± 8.8 | 48.0 ± 10.5 | 45.6 ± 16.6 | |||
| Sex | 0.040 | 0.002 | < 0.001 | ||||
| Male | 35 (26.5) | 38.2 ± 9.4 | 53.0 ± 10.8 | 37.4 ± 14.3 | |||
| Female | 97 (73.5) | 34.6 ± 8.7 | 46.3 ± 10.7 | 48.7 ± 15.6 | |||
| Education | 0.159 | 0.001 | 0.009 | ||||
| Low | 86 (65.2) | 34.8 ± 8.8 | 45.8 ± 11.3 | 48.4 ± 16.0 | |||
| High | 46 (34.8) | 37.1 ± 9.3 | 52.3 ± 9.4 | 40.7 ± 14.9 | |||
| BMI | 0.001 | 0.635 | 0.074 | ||||
| < 30 kg/m2 | 87 (65.9) | 37.4 ± 8.5 | 48.4 ± 11.1 | 43.9 ± 16.0 | |||
| ≥ 30 kg/m2 | 45 (34.1) | 31.9 ± 8.8 | 47.4 ± 11.3 | 49.2 ± 15.6 | |||
| Depressive symptoms (GDS ≥ 6) | 0.005 | < 0.001 | < 0.001 | ||||
| No | 102 (77.3) | 36.6 ± 9.2 | 51.1 ± 9.3 | 42.7 ± 14.9 | |||
| Yes | 30 (22.7) | 31.9 ± 7.3 | 37.7 ± 10.7 | 55.8 ± 15.7 | |||
| Cognitive impairment (MMSE < 24) | 0.883 | 0.663 | 0.529 | ||||
| No | 121 (91.7) | 35.5 ± 9.2 | 48.2 ± 10.8 | 45.4 ± 16.1 | |||
| Yes | 11 (8.3) | 35.9 ± 5.9 | 46.6 ± 14.7 | 48.6 ± 14.8 | |||
| Comorbidity | 0.191 | 0.033 | 0.699 | ||||
| < 4 diseases | 44 (33.3) | 37.0 ± 8.9 | 51.0 ± 10.4 | 46.5 ± 17.9 | |||
| ≥ 4 diseases | 88 (66.7) | 34.0.8 ± 9 | 46.6 ± 11.2 | 45.3 ± 15.1 | |||
| Current smoker | 0.387 | 0.828 | 0.400 | ||||
| No | 115 (87.1) | 35.3 ± 9.1 | 48.1 ± 10.7 | 46.2 ± 15.9 | |||
| Yes | 17 (12.9) | 37.3 ± 7.7 | 47.5 ± 13.7 | 42.6 ± 16.6 | |||
| Current alcohol user | 0.097 | 0.101 | 0.005 | ||||
| No | 27 (20.5) | 33.0 ± 8.0 | 44.9 ± 10.6 | 52.1 ± 11.5 | |||
| Yes | 105 (79.5) | 36.2 ± 9.1 | 48.9 ± 11.1 | 44.1 ± 16.6 | |||
| Surgery type | 0.574 | 0.159 | 0.016 | ||||
| UKA | 47 (35.6) | 36.2 ± 8.2 | 46.2 ± 11.0 | 41.2 ± 13.8 | |||
| TKA | 85 (64.4) | 35.2 ± 9.4 | 49.1 ± 11.1 | 48.2 ± 16.7 | |||
Abbreviation: SD standard deviation, SF-12 Short-Form General Health Survey, PCS physical component scores, MCS mental component scores, WOMAC Western Ontario and McMaster Universities Arthritis Index, BMI Body Mass Index, GDS Geriatric Depression Scale, MMSE Mini-Mental State Examination, UKA unicompartmental knee arthroplasty, TKA total knee arthroplasty
SF-12 (PCS, MCS) ranges from 0 [worst] to 100 [best]
WOMAC-Index is normalised to 100, ranges from 0 [best] to 100 [worst]