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

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Table 4 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 Japan address (%)	Authors with non-Japan address
ACE and athletic performance	29 (7.3%)	371	400	P = 0.072
ACE independent of athletic performance	48 (11.0%)	387	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 Norway address (%)	Authors with non-Norway address
MSTN and athletic performance	0 (0%)	89	89	P < 0.0015
MSTN independent of athletic performance	10 (11.2%)	79	89
	Authors with Japan address (%)	Authors with non-Japan address
All factors pooled and athletic performance	38 (5.9%)	597	635	P = 0.0071
All factors independent of athletic performance	73 (10.1%)	652	725

Country indicates for each innate factor the country, other than the USA, that authors most frequently listed as their address on papers about each innate factor independent of athletic performance. For all papers pooled, country indicates the country, other than the USA, that authors most frequently listed as their address on papers about the innate factors independent of athletic performance. Fisher exact tests tested the null hypotheses 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.