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Table 2 Means, standard deviations, intraclass correlation coefficients and reliability estimates (ω) for the baseline (standard) and daily administrations of the SF-36

From: Detecting short-term change and variation in health-related quality of life: within- and between-person factor structure of the SF-36 health survey

  Baseline SF-36 Daily SF-36
Variable Mean SD Omega (BP) Mean SD ICC Omega (BP) Omega (WP)
Physical functioning 81.4 21.7 .92 84.3 22.8 .89 .96 .70
 Vigorous 42.8 38.4   58.0 41.0 .81   
 Moderate 82.0 31.9   83.4 31.6 .83   
 Climb several 75.4 35.7   80.4 34.5 .82   
 Climb one 92.0 22.0   92.8 22.3 .68   
 Bending 75.8 31.1   81.0 31.2 .81   
 Walk mile 81.8 33.4   80.5 35.3 .84   
 Walk several blocks 88.1 27.7   87.8 28.4 .81   
 Walk one block 96.1 15.0   95.1 18.9 .73   
 Bathing 98.0 11.8   97.7 12.6 .52   
Role physical 78.6 35.7 .84 84.0 32.1 .62 .96 .68
 Cut down 58.4 35.3   87.6 32.9 .52   
 Accomplished 74.6 43.6   82 38.5 .51   
 Limited 77.0 42.1   82.5 38.0 .62   
Role emotional 84.7 29.7 .81 93.7 20.1 .38 .90 .73
 Cut down 88.7 31.7   95.0 21.8 .32   
 Accomplished 77.9 41.5   89.6 30.6 .34   
 Not careful 87.5 33.1   96.6 18.1 .36   
Vitality 65.1 17.3 .82 68.1 21.7 .73 .95 .74
 Pep 60.2 21.4   59.7 25.9 .70   
 Energy 59.5 22.9   61.1 26.0 .65   
 Worn-out 76.8 21.7   81.7 23.7 .66   
 Tired 64.2 20.0   69.9 23.6 .58   
Mental health 80.0 13.4 .76 86.2 12.6 .56 .90 .60
 Nervous 84.1 21.6   92.9 17.1 .44   
 Dumps 93.1 15.2   96.7 13.7 .31   
 Calm 63.9 18.5   70.7 22.4 .52   
 Blue 85.1 18.7   93.8 15.6 .35   
 Happy 73.4 16.0   76.7 19.7 .50   
Social functioning 87.9 19.2 a 91.6 18.7 .57 a a
 Extent 88.9 18.9   92.4 18.4 .52   
 Time 86.9 21.4   90.9 22.4 .48   
Bodily pain 73.5 23.1 a 80.4 22.7 .81 a a
 Magnitude 84.7 21.0   72.5 27.4 .80   
 Interfere 61.7 28.5   88.3 20.9 .74   
General health 67.3 16.2 .81 64.2 13.9 .41 a a
 In general/Today 70.2 21.4   73.3 21.1 .73   
 Last year/Yesterday 52.5 17.6   55.0 15.9 .09   
 Easier 84.6 22.6   - - -   
 Healthy 74.0 27.2   - - -   
 Worse 51.8 28.2   - - -   
 Excellent 71.5 26.3   - - -   
  1. Note. ICC intraclass correlation coefficient, WP within-person, BP between-person
  2. aReliability could not be computed due to insufficient number of items for the subscale