Table 4. Spearman’s rank correlation coefficients among the HAQ-DI, SF-36 and WHOQOL-BREF.
| SF36PF | SF36RP | SF36RE | SF36VT | SF36ME | SF36SF | SF36BP | SF36GH | WHOPH | WHOPSY | WHOSR | WHOENV | HAQ-TOTAL | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SF36PF | 1.000 | 0.423* | 0.276 | 0.205 | 0.261 | 0.307 | 0.307 | 0.395 | 0.531** | 0.149 | 0.317 | 0.466* | -0.699** |
| SF36RP | 0.423* | 1.000 | 0.497* | 0.270 | 0.412* | 0.453* | 0.416* | 0.477* | 0.423* | 0.299 | 0.092 | 0.417* | -0.334 |
| SF36RE | 0.276 | 0.497* | 1.000 | .459* | 0.657** | 0.714** | 0.562** | 0.566** | 0.488* | 0.689** | 0.297 | 0.423* | -0.322 |
| SF36VT | 0.205 | 0.270 | 0.459* | 1.000 | 0.749** | 0.327 | 0.145 | 0.526** | 0.338 | 0.480* | 0.169 | 0.307 | -0.030 |
| SF36ME | 0.261 | 0.412* | 0.657** | 0.749** | 1.000 | 0.521** | 0.313 | 0.577** | 0.389 | 0.788** | 0.379 | 0.560** | -0.148 |
| SF36SF | 0.307 | 0.453* | 0.714** | 0.327 | 0.521** | 1.000 | 0.904** | 0.749** | 0.766** | 0.739** | 0.273 | 0.496* | -0.580** |
| SF36BP | 0.307 | 0.416* | 0.562** | 0.145 | 0.313 | 0.904** | 1.000 | 0.623** | 0.718** | 0.556** | 0.186 | 0.375 | -0.652** |
| SF36GH | 0.395 | 0.477* | 0.566** | 0.526** | 0.577** | 0.749** | 0.623** | 1.000 | 0.510** | 0.621** | 0.041 | 0.573** | -0.409* |
| WHOPH | 0.531** | 0.423* | 0.488* | 0.338 | 0.389 | 0.766** | 0.718** | 0.510** | 1.000 | 0.511** | 0.381 | 0.498* | -0.769** |
| WHOPSY | 0.149 | 0.299 | 0.689** | 0.480* | 0.788** | 0.739** | 0.556** | 0.621** | 0.511** | 1.000 | 0.407* | 0.499* | -0.252 |
| WHOSR | 0.317 | 0.092 | 0.297 | 0.169 | 0.379 | 0.273 | 0.186 | 0.041 | 0.381 | 0.407* | 1.000 | 0.273 | -0.403* |
| WHOENV | 0.466* | 0.417* | 0.423* | 0.307 | 0.560** | 0.496* | 0.375 | 0.573** | 0.498* | 0.499* | 0.273 | 1.000 | -0.490* |
| HAQ-DI TOTAL | -0.699** | -0.334 | -0.322 | -0.030 | -0.148 | -0.580** | -0.652** | -0.409* | -0.769** | -0.252 | -0.403* | -0.490* | 1.000 |
*Correlation significant at the 0.05 level; **correlation significant at the 0.01 level; SF-36 = Short Form Health Survey; SF36PF = Short Form Health Survey-Physical Functioning; SF36RP = Short Form Health Survey-Role Limitation due to Physical Problems; SF36RE = Short Form Health Survey-Role Limitations due to Emotional Problems; SF36VT = Short Form Health Survey-Vitality; SF36ME = Short Form Health Survey-Mental Health; SF36SF = Short Form Health Survey-Social Functioning; SF36BP = Short Form Health Survey-Body Pain; SF36GH = Short Form Health Survey-General Health Perception; WHOQOL-BREF = World Health Organization Quality of Life Questionnaire-BREF; WHOPH = World Health Organization Quality of Life Questionnaire-BREF-Physical Health; WHOSR = World Health Organization Quality of Life Questionnaire-BREF-Social Relationship; WHOPSY = World Health Organization Quality of Life Questionnaire-BREF-Psychological; WHOENV = World Health Organization Quality of Life Questionnaire-BREF-Environment; HAQ-DI TOTAL = Health Assessment Questionnaire Disability Index-Total score