Table 3.
Differences in Quality of Life Scores at Enrollment Among the Physical Function Latent Classes
| Characteristic | Well Below Normative Score (0) 20.4% (n=74) |
Below Normative Score (1) 43.8% (n=159) |
Above Normative Score (2) 35.8% (n=130) |
Statistics |
|---|---|---|---|---|
|
| ||||
| Mean (SD) | Mean (SD) | Mean (SD) | ||
| Medical Outcomes Study – Short Form-12 | ||||
| Physical functioning | 9.6 (15.4) | 42.7 (26.9) | 81.1 (22.6) | F=223.92, p<.001 0 < 1 < 2 |
| Role physical | 25.2 (19.2) | 46.0 (24.0) | 73.6 (22.3) | F=114.77, p<.001 0 < 1 < 2 |
| Bodily pain | 55.6 (33.1) | 78.1 (24.7) | 94.0 (13.6) | F=61.24, p<.001 0 < 1 < 2 |
| General health | 35.9 (27.8) | 64.8 (23.1) | 75.7 (22.8) | F=63.71, p<.001 0 < 1 < 2 |
| Vitality | 26.4 (22.6) | 40.5 (25.6) | 62.6 (22.5) | F=58.78, p<.001 0 < 1 < 2 |
| Social functioning | 43.2 (33.9) | 66.7 (30.6) | 82.0 (25.5) | F=39.56, p<.001 0 < 1 < 2 |
| Role emotional | 68.7 (34.1) | 72.4 (27.8) | 85.8 (20.8) | F=12.24, p<.001 0 and 1 < 2 |
| Mental health | 73.8 (20.3) | 73.2 (22.0) | 78.5 (17.9) | F=2.69, p=.069 |
| Physical component summary score | 26.2 (6.6) | 39.8 (6.5) | 50.6 (5.9) | F=325.23, p<.001 0 < 1 < 2 |
| Mental component summary score | 49.9 (11.9) | 49.2 (11.5) | 51.8 (9.3) | F=1.92, p=.148 |
| Quality of Life Scale – Patient Version | ||||
| Physical well-being | 6.0 (1.6) | 6.9 (1.6) | 8.0 (1.3) | F=44.23, p<.001 0 < 1 < 2 |
| Psychological well-being | 5.0 (1.8) | 5.8 (1.9) | 6.4 (1.8) | F=13.52, p<.001 0 < 1 < 2 |
| Social well-being | 5.4 (1.8) | 6.4 (1.8) | 7.3 (1.6) | F=25.44, p<.001 0 < 1 < 2 |
| Spiritual well-being | 4.9 (2.3) | 5.0 (2.1) | 4.8 (2.1) | F=0.25, p=.776 |
| Total quality of life score | 5.3 (1.5) | 6.0 (1.4) | 6.7 (1.3) | F=23.04, p<.001 0 < 1 < 2 |
Abbreviation: SD= standard deviation