OBJECTIVE: To compare the ranking of mattresses using several different performance indices, calculated from interface pressure-mapping data. METHOD: Five mattresses were compared using interface pressure-mapping on 10 healthy volunteers. Mattresses were ranked in order, on the basis of several different specified performance indices. RESULTS: Different performance indices ranked the mattresses in different orders. CONCLUSION: Elaborate performance indices should be used with care, since it is possible to construct a 'tailor-made' performance index to make any chosen mattress rank as the best. Care should be taken to ensure that a performance index is validated, preferably by some demonstrated link to clinical outcomes.
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Bain et al. (2003) studied this question.
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