Table 5 Weights derived from orthogonal and oblique factor analysis used to create PCS-12 and MCS-12 scores
From: Correlated physical and mental health summary scores for the SF-36 and SF-12 Health Survey, V.1
Item/Response Choice | Variable | Physical Weight | Mental Weight | ||
|---|---|---|---|---|---|
| Â | Â | Orthogonal | Oblique | Orthogonal | Oblique |
Moderate Activity (PF02) | Â | PCSuc-12 | PCSc-12 | MCSuc-12 | MCSc-12 |
Limited a lot | PF02_1 | -7.23216 | -3.61039 | 3.93115+ | 0.21329+ |
Limited a little | PF02_2 | -3.45555 | -1.52769 | 1.86840+ | 0.15672+ |
Climbing Several Flights of Stairs (PF04) | Â | Â | Â | Â | Â |
Limited a lot | PF04_1 | -6.24397 | -3.28556 | 2.68282+ | 0.12950+ |
Limited a little | PF04_2 | -2.73557 | -1.49769 | 1.43103+ | 0.08028+ |
Accomplished less than you would like (RP2) | Â | Â | Â | Â | Â |
Yes | RP2_1 | -4.61617 | -3.72452 | 1.44060+ | -0.67652 |
Limited in the kind of work or activities (RP3) | Â | Â | Â | Â | Â |
Yes | RP3_1 | -5.51747 | -4.48695 | 1.66968+ | -0.73255 |
How much did pain interfere with norm work (BP2) | Â | Â | Â | Â | Â |
Extremely | BP2_1 | -11.25544 | -10.32862 | 1.48619+ | -3.57055 |
Quite a bit | BP2_2 | -8.38063 | -7.60094 | 1.76691+ | -2.24871 |
Moderately | BP2_3 | -6.50522 | -5.21603 | 1.49384+ | -1.45064 |
A little bit | BP2_4 | -3.80130 | -2.76223 | 0.90384+ | -0.85395 |
In general, would you say your health is (GH1) | Â | Â | Â | Â | Â |
Poor | GH1_1 | -8.37399 | -6.90853 | -1.71175 | -4.28199 |
Fair | GH1_2 | -5.56461 | -4.56043 | -0.16891 | -2.78736 |
Good | GH1_3 | -3.02396 | -2.48820 | 0.03482+ | -1.45741 |
Very Good | GH1_4 | -1.31872 | -1.09399 | -0.06064* | -0.54378 |
Have a lot of energy (VT2) | Â | Â | Â | Â | Â |
None of the time | VT2_1 | -2.44706 | -5.94178 | -6.02409 | -10.46333 |
A little of the time | VT2_2 | -2.02168 | -4.68268 | -4.88962 | -8.13254 |
Some of the time | VT2_3 | -1.61850 | -3.43746 | -3.29805 | -6.11303 |
A good bit of the time | VT2_4 | -1.14387 | -2.28701 | -1.65178 | -3.95386 |
Most of the time | VT2_5 | -0.42251 | -1.19645 | -0.92057 | -1.96823 |
How much of the time health interferes w/social activities (SF2) | Â | Â | Â | Â | Â |
All the time | SF2_1 | -0.33682* | -2.57689* | -6.29724* | -3.51605* |
Most of the time | SF2_2 | -0.94342* | -3.29868* | -8.26066* | -4.19005* |
Some of the time | SF2_3 | -0.18043 | -2.42780 | -5.63286 | -3.20648 |
A little of the time | SF2_4 | 0.11038 | -1.21560 | -3.13896 | -1.71673 |
Accomplished less than you would like (RE2) | Â | Â | Â | Â | Â |
Yes | RE2_1 | 3.04365+ | -0.27441 | -6.82672 | -3.37939 |
Didn't do work or other activities as carefully as usual (RE3) | Â | Â | Â | Â | Â |
Yes | RE3_1 | 2.32091+ | -0.87743 | -5.69921 | -3.38503 |
Felt calm and peaceful (MH3) | Â | Â | Â | Â | Â |
None of the time | MH3_1 | 3.46638+ | -0.64678 | -10.19085 | -9.27580 |
A little of the time | MH3_2 | 2.90426+ | -0.47407* | -7.92717 | -7.67490 |
Some of the time | MH3_3 | 2.37241+ | -0.38979* | -6.31121 | -5.60048 |
A good bit of the time | MH3_4 | 1.36689+ | -0.53677* | -4.09842 | -3.87498 |
Most of the time | MH3_5 | 0.66514+ | -0.24474 | -1.94949 | -1.91559 |
Felt downhearted and blue (MH4) | Â | Â | Â | Â | Â |
All of the time | MH4_1 | 4.61446+ | -1.32335 | -16.15395 | -14.96225 |
Most of the time | MH4_2 | 3.41593+ | -0.75981 | -10.77911 | -11.60997 |
A good bit of the time | MH4_3 | 2.34247+ | -0.53385 | -8.09914 | -7.91401 |
Some of the time | MH4_4 | 1.28044+ | -0.38595 | -4.59055 | -4.63416 |
A little of the time | MH4_5 | 0.41188+ | -0.15932 | -1.95934 | -2.15359 |
Constant | Â | 56.57706 | 62.37966 | 60.75781 | 65.38813 |