An exploratory study of the cost-effectiveness of orthodontic care in seven European countries.

Eur J Orthod · 2009 · PMC2638876 · PMID 18854553

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may be significantno p-value reported

The findings in the present investigation suggest that there may be significant differences in the cost-effectiveness of orthodontic care when viewed from a pan-European perspective, but this is largely explained by the differences in costs.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.