. 2023 Oct 20;102(42):e35633. doi: 10.1097/MD.0000000000035633

Table 2.

Relationship between categoric variables and video quality scores.

Variables		DISCERN	Statistical Significance	DISCERN post hoc Comparisons	GQS	Statistical Significance	GQS post hoc Comparisons	JAMA	Statistical Significance	JAMA post hoc Comparisons
Variables		Median ± IQR	Statistical Significance	DISCERN post hoc Comparisons	Median ± IQR	Statistical Significance	GQS post hoc Comparisons	Median ± IQR	Statistical Significance	JAMA post hoc Comparisons
Uploader	YouTube Channel (G1)	33 ± 14	<0.001	G1–G2: <0.001	1 ± 2	<0.001	G1–G2: <0.001	1 ± 1	<0.001	G1–G2: <0.001
	Healthcare Institute (G2)	60 ± 19		G2–G3: 0.666	3 ± 0.5		G2–G3: 0.696	3 ± 1		G2–G3: 0.369
	Medical Doctor (G3)	64 ± 18		G1–G3: <0.001	3 ± 2		G1–G3: <0.001	3 ± 1		G1–G3: 0.007
Professionality	Non professional	33 ± 14	<0.001		1 ± 2	<0.001		1 ± 1	<0.001
Professionality	Professional	63 ± 20	<0.001		3 ± 2	<0.001		3 ± 2	<0.001
Upload date	Old (> 5 yr)	44 ± 21.5	0.968		2 ± 2	0.799		2 ± 2	0.830
Upload date	New (≤ 5 yr)	44 ± 35	0.968		2 ± 2	0.799		2 ± 2	0.830
Daily view count	Daily view count ≤ 34	40 ± 31	0.356		1 ± 3	0.236		2 ± 2	0.388
Daily view count	Daily view count > 34	46 ± 30	0.356		2 ± 2	0.236		2 ± 2	0.388
Video duration	Video length ≤ 5 min	39.5 ± 20.5	0.070		1 ± 1.5	0.062		2 ± 2	0.035
Video duration	Video Length > 5 min	59.5 ± 43	0.070		3 ± 3	0.062		3 ± 3	0.035
VPI	VPI ≤ 95	41 ± 27	0.797		1.5 ± 2	0.847		2 ± 2	0.743
VPI	VPI > 95	46 ± 32	0.797		2 ± 2	0.847		2 ± 2	0.743
Comment/yr	Comment/yr ≤ 18	38 ± 31	0.314		1 ± 3	0.285		2 ± 2	0.282
Comment/yr	Comment/yr > 18	46 ± 26	0.314		2 ± 2	0.285		2 ± 2	0.282

G1 = Group 1, G2 = Group 2, G3 = Group 3, GQS = Global quality score, IQR = Interquartile range, JAMA = Journal of the American Medical Association, VPI = Video Popularity Index.