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. 2018 Jun 12;7(4):239–247. doi: 10.1007/s40037-018-0438-5

Table 2.

Citation negative binomial model results

Coefficient IRR 95% IRR CI
(Intercept) *** 0.28 0.23, 0.35
Publicly accessible * 0.81 0.67, 0.98
References *** 1.00 1.00, 1.01
Bloggers * 1.13 1.01, 1.25
Tweets *** 1.01 1.00, 1.01
News outlets 0.98 0.93, 1.04
Facebook 0.97 0.92, 1.02
Mendeley *** 1.01 1.00, 1.01
Journal impact factor *** 1.21 1.13, 1.30
Time (in weeks) *** 1.01 1.00, 1.01
Publicly accessible × JIF ** 1.12 1.04, 1.21

IRR incident rate ratio, CI confidence interval

*p-value <0.05, **p-value <0.01, ***p-value <0.001