Point-biserial correlation coefficient for the use of a single-blinded peer review system vs. a journal’s impact factor (p value) | Point-biserial correlation coefficient for the presence of a reviewer recommendation option or obligation vs. a journal’s impact factor (p value) | Point-biserial correlation coefficient for the presence of a nonpreferred reviewer option vs. a journal’s impact factor (p value) | |
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All medical imaging journals (n = 119) | 0.218 (p = 0.022)a | 0.032 (p = 0.727) | 0.064 (p = 0.492) |
All medical imaging journals except radiotherapy journals, journals for physicists, engineers, and chemists, and journals related to a single country1 (n = 70) | 0.220 (p = 0.777)b | − 0.019 (p = 0.878) | 0.036 (p = 0.770) |
Only general medical imaging journals (n = 27)2 | 0.053 (p = 0.810)c | 0.083 (p = 0.681) | 0.249 (p = 0.211) |
Only subspecialty medical imaging journals (n = 41)3 | 0.354 (p = 0.025)d | − 0.102 (p = 0.527) | − 0.114 (p = 0.478) |
Medical imaging journals with more than 1000 published articles per 2-year period (n = 36)4 | 0.286 (p = 0.964)e | 0.130 (p = 0.448) | 0.187 (p = 0.275) |
Medical imaging journals with less than 1000 published articles per 2-year period (n = 34)4 | 0.180 (p = 0.341)f | − 0.179 (p = 0.310) | − 0.124 (p = 0.486) |