Table 4. Multivariate Linear Regression Model for Key Publication Characteristics, Citations, and the Altmetric Attention Score.
| Variable | Regression coefficient | 95% Confidence interval | p-value | |
|---|---|---|---|---|
| Reference: subscription access | ||||
| Open Access | 3.61 | 1.33 to 5.81 | < 0.01* | |
| Reference: No general COI | ||||
| COI | 17.17 | 2.72 to 31.62 | 0.042* | |
| Reference: Non-MD/DO† | ||||
| MD or DO | –4.64 | –15.15 to 43.18 | 0.654 | |
| Reference: Not from North America | ||||
| Continent of origin: North America | 5.78 | –16.66 to 35.36 | 0.546 | |
| Reference: Before 2017 | ||||
| Year: after and including 2017 | 13.53 | –24.21 to 28.39 | 0.140 | |
| Number of authors | –3.39 | –8.24 to 3.53 | 0.106 | |
| Number of institutions | 2.22 | –1.53 to 19.78 | 0.335 | |
| Number of references | 0.22 | –0.29 to 0.79 | 0.417 | |
| Number of citations | –0.02 | –0.06 to 0.08 | 0.601 | |
COI: conflict of interest.
*Indicates statistical significance at p < 0.05 level. †Other author degrees include BS, MS, PhD, MD PhD, MD MBA, MD MS, MD MPH, and PT.