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Figure 2 | Health and Quality of Life Outcomes

Figure 2

From: Interpretation of response categories in patient-reported rating scales: a controlled study among people with Parkinson's disease

Figure 2

Selected response categories. Selected response categories for three-, four-, five-, and six-category response scales as determined from observed visual analog scales (VAS) values. See Methods for details.

* 95% CI of category VAS value does not cover criterion value. Arrows indicate direction of discrepancy (←, below criterion value; →, above criterion value); see Table 1 for raw data.

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