Results of logistic regression for UPRL, of FP-funded publications with at least one UK-based author, 2008–2016 (source: Scopus and Overton)
| Variable . | Logistic regression for variables in logarithmic form and in level . | ||||||
|---|---|---|---|---|---|---|---|
| Log-transformed (Model 1) . | Level (Model 2) . | Level – for one standard dev. (Model 3) . | |||||
| Coefficients . | Odds ratio . | Coefficients . | Odds ratio . | Coefficients . | Odds ratio . | Δp (baseline = 10%) . | |
| Normalized citation score | 0.960*** (0.035) | 2.613 | 0.086*** (0.006) | 1.09 | 0.613*** (0.043) | 1.846 | 7.0% |
| Normalized CiteScore | 0.024 (0.063) | 1.024 | 0.153*** (0.021) | 1.166 | 0.207*** (0.029) | 1.23 | 2.0% |
| Document type (Review = 1) | 0.727*** (0.101) | 2.07 | 0.507*** (0.096) | 1.661 | 0.507*** (0.096) | 1.661 | 5.6% |
| Multidisciplinary (DDA) | 0.234*** (0.058) | 1.264 | 0.109*** (0.026) | 1.115 | 0.129*** (0.031) | 1.138 | 1.2% |
| Interdisciplinarity (DDR) | 0.017 (0.125) | 1.017 | 0.07 (0.089) | 1.073 | 0.032 (0.041) | 1.033 | 0.3% |
| Number of authors | −0.111** (0.048) | 0.895 | −0.006*** (0.001) | 0.994 | −0.780*** (0.176) | 0.458 | −5.2% |
| Number of countries | 0.163*** (0.063) | 1.178 | 0.074*** (0.011) | 1.077 | 0.279*** (0.040) | 1.322 | 2.8% |
| Proportion of female authors | 0.300** (0.152) | 1.35 | 0.152 (0.143) | 1.164 | 0.033 (0.031) | 1.033 | 0.3% |
| Avg. number of papers per author | 0.107*** (0.040) | 1.113 | 0.003*** (0.001) | 1.003 | 0.115*** (0.039) | 1.122 | 1.1% |
| Observations | 37,897 | 37,897 | 37,897 | ||||
| Log Likelihood | −3,446.58 | −3,754.04 | −3,754.04 | ||||
| Wald Test (df = 9) | 1,046.660*** | 528.910*** | 528.910*** | ||||
| LR Test (df = 9) | 1,345.617*** | 730.702*** | 730.702*** | ||||
| Score (Logrank) Test (df = 9) | 1,316.022*** | 766.147*** | 766.147*** | ||||
| Variable . | Logistic regression for variables in logarithmic form and in level . | ||||||
|---|---|---|---|---|---|---|---|
| Log-transformed (Model 1) . | Level (Model 2) . | Level – for one standard dev. (Model 3) . | |||||
| Coefficients . | Odds ratio . | Coefficients . | Odds ratio . | Coefficients . | Odds ratio . | Δp (baseline = 10%) . | |
| Normalized citation score | 0.960*** (0.035) | 2.613 | 0.086*** (0.006) | 1.09 | 0.613*** (0.043) | 1.846 | 7.0% |
| Normalized CiteScore | 0.024 (0.063) | 1.024 | 0.153*** (0.021) | 1.166 | 0.207*** (0.029) | 1.23 | 2.0% |
| Document type (Review = 1) | 0.727*** (0.101) | 2.07 | 0.507*** (0.096) | 1.661 | 0.507*** (0.096) | 1.661 | 5.6% |
| Multidisciplinary (DDA) | 0.234*** (0.058) | 1.264 | 0.109*** (0.026) | 1.115 | 0.129*** (0.031) | 1.138 | 1.2% |
| Interdisciplinarity (DDR) | 0.017 (0.125) | 1.017 | 0.07 (0.089) | 1.073 | 0.032 (0.041) | 1.033 | 0.3% |
| Number of authors | −0.111** (0.048) | 0.895 | −0.006*** (0.001) | 0.994 | −0.780*** (0.176) | 0.458 | −5.2% |
| Number of countries | 0.163*** (0.063) | 1.178 | 0.074*** (0.011) | 1.077 | 0.279*** (0.040) | 1.322 | 2.8% |
| Proportion of female authors | 0.300** (0.152) | 1.35 | 0.152 (0.143) | 1.164 | 0.033 (0.031) | 1.033 | 0.3% |
| Avg. number of papers per author | 0.107*** (0.040) | 1.113 | 0.003*** (0.001) | 1.003 | 0.115*** (0.039) | 1.122 | 1.1% |
| Observations | 37,897 | 37,897 | 37,897 | ||||
| Log Likelihood | −3,446.58 | −3,754.04 | −3,754.04 | ||||
| Wald Test (df = 9) | 1,046.660*** | 528.910*** | 528.910*** | ||||
| LR Test (df = 9) | 1,345.617*** | 730.702*** | 730.702*** | ||||
| Score (Logrank) Test (df = 9) | 1,316.022*** | 766.147*** | 766.147*** | ||||
Note: Binary logarithms of normalized citation counts, normalized CiteScore, DDA, DDR, number of authors/countries, and average number of papers per author were used in Model 1. Therefore, the odds ratio of these coefficients refers to the variation in odds associated with a twofold change in the explanatory variables. *p < 0.1; **p < 0.05; ***p < 0.01.