Macro-indicators of citation impacts of six prolific countries: InCites data and the statistical significance of trends.

PLoS One · 2013 · PMC3572076 · PMID 23418600

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a decreasing trendno p-value reported

In the next graph in the figure, the medical and health sciences show significantly increasing trends for Germany (r s = 1.0) and France (r s = 1.0) but a decreasing trend for the USA (r s = −.64).

also in 47,180 other papers

an increasing trendno p-value reported

The citation impact of papers from China is still at a relatively low level (mostly below the world average), but the country follows an increasing trend line.

also in 63,971 other papers

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.