Multiple linear regression analysis of correlations between video characteristics and the VPI, JAMA score, GQS and CTS-ss
| Variable | Unstandardised beta (B) | 95% CI | Standardised β | P value |
| VPI (R2=0.997) | ||||
| Days since upload | −0.039 | −0.058 to −0.02 | −0.053 | <0.001 |
| View ratio | 0.595 | 0.576 to 0.614 | 0.985 | <0.001 |
| Number of likes | 14.118 | 6.808 to 21.428 | 0.075 | <0.001 |
| JAMA score (R2=0.626) | ||||
| Like ratio | 0.054 | 0.001 to 0.107 | 0.424 | 0.045 |
| Video source | ||||
| Academic | 2.126 | 1.164 to 3.088 | 0.801 | <0.001 |
| Physician | 1.187 | 0.239 to 2.136 | 0.49 | 0.015 |
| GQS (R2=0.561) | ||||
| Video running time | 0.001 | 0 to 0.002 | 0.252 | 0.044 |
| Number of comments | 0.002 | 0 to 0.003 | 0.461 | 0.029 |
| Video source | ||||
| Academic | 3.025 | 1.735 to 4.315 | 0.921 | <0.001 |
| Physician | 2.465 | 1.193 to 3.736 | 0.821 | <0.001 |
| Non-physician | 1.596 | 0.337 to 2.856 | 0.626 | 0.014 |
| Medical | 1.878 | 0.661 to 3.094 | 0.625 | 0.003 |
| Commercial | 1.874 | 0.32 to 3.429 | 0.368 | 0.019 |
| CTS-ss (R2=0.356) | ||||
| Video source | ||||
| Academic | 6.225 | 1.825 to 10.624 | 0.673 | 0.007 |
| Physician | 5.174 | 0.838 to 9.51 | 0.612 | 0.021 |
| Medical | 4.978 | 0.828 to 9.128 | 0.589 | 0.02 |
| Commercial | 6.430 | 1.13 to 11.731 | 0.448 | 0.019 |
CTS-ss, Carpal Tunnel Syndrome-Specific Score; GQS, Global Quality Score; JAMA, Journal of the American Medical Association; VPI, Video Power Index.