Scientometric analyses of studies on the role of innate variation in athletic performance

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Table 3 National addresses of authors listed on papers published between 1 January 2000 and 31 December 2012 about digit ratio (DR), and angiotensin converting enzyme (ACE), α-actinin-3 (ACTN3) and myostatin (MSTN) genotypes that were either in the context of athletic performance or independent of athletic performance

	Country
Innate factor	Authors with United Kingdom address (%)	Authors with non-United Kingdom address	Total	Fisher exact test
DR and athletic performance	17 (30.4%)	39	56	P = 0.42
DR independent of athletic performance	17 (22.9%)	57	74
	Authors with Spain address (%)	Authors with non-Spain address
ACE and athletic performance	58 (14.5%)	342	400	P < 0.0001
ACE independent of athletic performance	1 (0.2%)	434	435
	Authors with Italy address (%)	Authors with non-Italy address
ACE and athletic performance	58 (14.5%)	342	400	P < 0.0001
ACE independent of athletic performance	22 (5.1%)	413	435
	Authors with Spain address (%)	Authors with non-Spain address
ACTN3 and athletic performance	36 (16.2%)	186	222	P = 0.64
ACTN3 independent of athletic performance	17 (13.9%)	105	122
	Authors with Germany address (%)	Authors with non-Germany address
MSTN and athletic performance	17 (19.1%)	72	89	P < 0.0001
MSTN independent of athletic performance	0 (0%)	89	89
All papers pooled	Authors with Spain address (%)	Authors with non-Spain address
All factors and athletic performance	74 (11.7%)	561	635	P < 0.0001
All factors independent of athletic performance	18 (2.5%)	707	725

Country indicates for each innate factor the country, other than the USA, that authors most frequently listed as their address on papers about the relationship between athletic performance and each innate factor. For all papers pooled, country indicates the country, other than the USA, that authors most frequently listed as their address on papers about the relationship between athletic performance and the innate factors pooled together. Fisher exact tests tested the null hypotheses that whether authors listed had either “country” or “non-country” addresses was independent of whether a paper’s focus was about the relationship between an innate factor and athletic performance or an innate factor independent of its relationship to athletic performance.