Key result
Simple methods for analyzing visual analogue scales can effectively handle complex data when comparing two or more groups of patients, as illustrated using data from the IPPPSH trial.
The paper provides practical statistical methods for analyzing patient self-assessment visual analogue scales in clinical trials.
The present paper describes an example of practical analysis of data from an application of visual analogue scales. Potentially useful and simple methods for analysing visual analogue scales are described for effective handling of complex data when the desire is to compare two or more groups of patients. Visual analogue scales were used to assess subjective tolerability in the International Prospective Primary Prevention Study in Hypertension, a large scale clinical trial. The methods are illustrated on the IPPPSH data.
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P. J. Solomon (1989) studied Hypertension. Visual analogue scales (VAS) was evaluated on Subjective tolerability. Simple methods for analyzing visual analogue scales can effectively handle complex data when comparing two or more groups of patients, as illustrated using data from the IPPPSH trial.
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