and each point is one tenth of a standard deviation. As shown in Figure 4,with norm-based scoring,differences in scale scores much more clearly reflect theimpact of the disease, in this example the impact of asthma. Clinicians can more quickly and appropriately interpret the effect of asthma on a SF-36 health profile. Because the PCS and MCS measures take into account the correlation among the eight SF-36 scales, it is clear that asthma impacts on the physical component of health, and (from the profile with five significant differences) impacts very broadly.
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