Table 5.
Adjusted means of SF-36v2™ component summary and domain scores by level of pain severity
| DV | Pain severity | Adjusted mean | SE | 95% LCL | 95% UCL | P-value |
|---|---|---|---|---|---|---|
| MCS | Matched control | 48.10 | 0.29 | 47.52 | 48.67 | – |
| Mild | 46.99 | 0.36 | 46.28 | 47.69 | 0.00 | |
| Moderate | 42.93 | 0.43 | 42.10 | 43.76 | <0.0001 | |
| Severe | 40.58 | 0.60 | 39.41 | 41.76 | <0.0001 | |
| PCS | Matched control | 52.93 | 0.17 | 52.59 | 53.27 | – |
| Mild | 50.29 | 0.22 | 49.86 | 50.71 | <0.0001 | |
| Moderate | 46.74 | 0.25 | 46.24 | 47.24 | <0.0001 | |
| Severe | 43.94 | 0.36 | 43.24 | 44.64 | <0.0001 | |
| Bodily Pain | Matched control | 52.49 | 0.24 | 52.02 | 52.96 | – |
| Mild | 46.44 | 0.30 | 45.86 | 47.02 | <0.0001 | |
| Moderate | 41.18 | 0.35 | 40.49 | 41.86 | <0.0001 | |
| Severe | 36.87 | 0.49 | 35.91 | 37.84 | <0.0001 | |
| General Health | Matched control | 46.80 | 0.26 | 46.29 | 47.32 | – |
| Mild | 43.78 | 0.33 | 43.14 | 44.42 | <0.0001 | |
| Moderate | 39.23 | 0.38 | 38.47 | 39.98 | <0.0001 | |
| Severe | 37.14 | 0.54 | 36.08 | 38.20 | <0.0001 | |
| Vitality | Matched control | 50.82 | 0.28 | 50.28 | 51.37 | – |
| Mild | 47.48 | 0.34 | 46.81 | 48.15 | <0.0001 | |
| Moderate | 42.93 | 0.40 | 42.14 | 43.72 | <0.0001 | |
| Severe | 39.76 | 0.57 | 38.65 | 40.88 | <0.0001 | |
| Social Functioning | Matched control | 50.99 | 0.27 | 50.46 | 51.52 | – |
| Mild | 50.59 | 0.33 | 49.94 | 51.25 | 0.25 | |
| Moderate | 46.98 | 0.39 | 46.20 | 47.75 | <0.0001 | |
| Severe | 44.70 | 0.56 | 43.62 | 45.79 | <0.0001 | |
| Mental Health | Matched control | 47.32 | 0.30 | 46.73 | 47.91 | – |
| Mild | 46.60 | 0.37 | 45.87 | 47.33 | 0.06 | |
| Moderate | 42.26 | 0.44 | 41.40 | 43.13 | <0.0001 | |
| Severe | 39.53 | 0.62 | 38.32 | 40.75 | <0.0001 | |
| Emotional Role Limitations | Matched control | 50.66 | 0.28 | 50.11 | 51.20 | – |
| Mild | 49.21 | 0.35 | 48.53 | 49.88 | <0.0001 | |
| Moderate | 45.83 | 0.41 | 45.03 | 46.63 | <0.0001 | |
| Severe | 43.65 | 0.57 | 42.52 | 44.77 | <0.0001 | |
| Physical Role Limitations | Matched control | 52.67 | 0.23 | 52.22 | 53.12 | – |
| Mild | 52.01 | 0.28 | 51.46 | 52.57 | 0.03 | |
| Moderate | 48.46 | 0.34 | 47.80 | 49.12 | <0.0001 | |
| Severe | 45.80 | 0.47 | 44.88 | 46.73 | <0.0001 | |
| Physical Functioning | Matched control | 53.59 | 0.17 | 53.25 | 53.93 | – |
| Mild | 53.39 | 0.21 | 52.97 | 53.80 | 0.35 | |
| Moderate | 51.04 | 0.25 | 50.55 | 51.53 | <0.0001 | |
| Severe | 48.86 | 0.35 | 48.17 | 49.55 | <0.0001 | |
| SF-6D (health utilities) | Matched control | 0.76 | 0.00 | 0.75 | 0.77 | – |
| Mild | 0.72 | 0.00 | 0.71 | 0.73 | <0.0001 | |
| Moderate | 0.66 | 0.01 | 0.65 | 0.67 | <0.0001 | |
| Severe | 0.62 | 0.01 | 0.61 | 0.64 | <0.0001 |
Notes: Generalized linear models, specifying a normal distribution and an identity function, were conducted. All models adjusted for age, sex, education, annual household income, body mass index category, exercise behavior, smoking habits, alcohol consumption, and the Charlson Comorbidity Index.
Abbreviations: DV, dependent variable; LCL, 95% lower confidence limit; MCS, mental component summary; PCS, physical component summary; SE, standard error of the mean; SF®, Short Form® Health Survey; UCL, 95% upper confidence limit.