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Table 9 Results of hurdle negative binomial model for Facebook data. The estimate/coefficient (SE), exponent of coefficient (OR and IRR), z and p-values (*p < 0.05, **p < 0.01, ***p < 0.001) are shown

From: Social media engagement analysis of U.S. Federal health agencies on Facebook

  Zero Portion Count Portion
Estimate (SE) OR z value p Estimate (SE) IRR z value p
(Intercept) −2.71 (0.47) 0.067 −5.763 *** −5.631 (0.169) 0.004 −33.356 ***
Log-transformed page likes 1.102 (0.025) 3.010 43.931 *** 1.797 (0.01) 6.033 174.673 ***
link −0.817 (0.462) 0.442 −1.77   0.554 (0.162) 1.741 3.421 ***
music −0.48 (0.57) 0.619 −0.843   0.06 (0.223) 1.062 0.271  
photo −0.22 (0.464) 0.802 −0.475   1.833 (0.163) 6.253 11.267 ***
question −5.62 (0.659) 0.004 −8.528 *** −0.456 (0.54) 0.634 −0.844  
status −2.499 (0.462) 0.082 −5.408 *** 0.861 (0.163) 2.365 5.28 ***
video −0.388 (0.473) 0.679 −0.82   1.041 (0.165) 2.833 6.302 ***
Positive Sentiment 0.16 (0.023) 1.174 7.051 *** 0.118 (0.009) 1.126 12.986 ***
Negative Sentiment −0.121 (0.015) 0.886 −7.857 *** −0.068 (0.006) 0.934 −10.692 ***
Activities & Behaviors 0.644 (0.031) 1.903 20.605 *** 0.06 (0.013) 1.061 4.741 ***
Anatomy 0.088 (0.051) 1.092 1.743   0.048 (0.022) 1.049 2.191 *
Chemicals & Drugs 0.112 (0.035) 1.118 3.237 ** 0.07 (0.015) 1.073 4.771 ***
Concepts & Ideas 0.366 (0.027) 1.441 13.361 *** −0.013 (0.012) 0.987 −1.041  
Devices 0.321 (0.161) 1.378 1.998 * −0.021 (0.066) 0.980 −0.312  
Disorders 0.329 (0.032) 1.390 10.369 *** −0.035 (0.014) 0.965 −2.514 *
Genes & Molecular Sequences 0.567 (0.199) 1.763 2.85 ** −0.084 (0.06) 0.920 −1.402  
Geographic Areas 0.091 (0.041) 1.095 2.232 * −0.187 (0.017) 0.830 −10.776 ***
Living Beings 0.242 (0.028) 1.274 8.675 *** 0.01 (0.012) 1.010 0.787  
Objects 0.212 (0.036) 1.236 5.9 *** −0.117 (0.015) 0.889 −7.769 ***
Occupations 0.055 (0.05) 1.057 1.108   −0.232 (0.02) 0.793 −11.472 ***
Organizations −0.35 (0.041) 0.705 −8.468 *** −0.078 (0.018) 0.925 −4.425 ***
Phenomena 0.257 (0.041) 1.293 6.25 *** 0.144 (0.017) 1.155 8.44 ***
Physiology 0.284 (0.031) 1.328 9.13 *** 0.034 (0.013) 1.035 2.614 **
Procedures 0.2 (0.036) 1.222 5.597 *** −0.034 (0.015) 0.966 −2.277 *
Log(theta)      −0.172 (0.011) 0.842 −15.005 ***