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. 2011 Mar 4;6(3):e17428. doi: 10.1371/journal.pone.0017428

Table 3. Performance and Impact indicators for the 72 papers at the 10% highly-cited level by publication type.

Type P C CPP CPP/JCSm CPP/FCSm JCSm/FCSm
Total 72 1522 21.14 1.74 5.42 3.11
Primary study 22 528 24.0 1.66 6.62 4.02
Secondary study 13 216 16.62 3.38 5.77 1.75
Review article 9 219 24.33 1.05 4.90 4.49
Cross-protocol study 4 72 18.0 .84 3.27 3.93
Collaborative/external study 17 419 24.65 2.48 5.17 2.12
Observational study 4 18 4.50 1.95 4.69 2.08
Other 3 50 16.67 2.29 3.95 1.81

Note: P = number of articles published; C = total number of citations; CPP = average number of citations per publication; JCSm = average expected citations for a journal set; FCSm = average expected citations across a combination of fields.