Table 5.

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.