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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
   Orthogonal Oblique Orthogonal Oblique
Moderate Activity (PF02)   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)      
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)      
Yes RP2_1 -4.61617 -3.72452 1.44060+ -0.67652
Limited in the kind of work or activities (RP3)      
Yes RP3_1 -5.51747 -4.48695 1.66968+ -0.73255
How much did pain interfere with norm work (BP2)      
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)      
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)      
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)      
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)      
Yes RE2_1 3.04365+ -0.27441 -6.82672 -3.37939
Didn't do work or other activities as carefully as usual (RE3)      
Yes RE3_1 2.32091+ -0.87743 -5.69921 -3.38503
Felt calm and peaceful (MH3)      
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)      
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   56.57706 62.37966 60.75781 65.38813
  1. * Magnitude Inconsistent/+ Incorrect Sign; n = 6,565