Table 1. Description of video features and demographics of TikTok videos uploaded by older adults by valence of content ^a.

Valence of Video Content (Outcome)	Negative		Neutral		Positive		pb
	N = 120		N = 424		N = 838
Video Themes
Physical Functioning	21	17.5%	9	2.1%	445	53.1%	0.000
Cognitive Functioning	18	15.0%	2	0.5%	3	0.4%	0.000
Social Interaction	19	15.8%	15	3.5%	380	45.3%	0.000
Demographics of Older Adult(s) in the Video
Age							0.000
0—Young-old (60–74)	41	34.2%	123	29.0%	214	25.5%
1—Middle-old (75–84)	40	33.3%	141	33.3%	300	35.8%
2—Oldest-old (≥85)	39	32.5%	80	18.9%	181	21.6%
3—Mix	0	0.0%	0	0.0%	50	6.0%
4—Unknown	0	0.0%	80	18.9%	93	11.1%
Gender							0.000
0—Man	10	8.3%	166	39.2%	201	24.0%
1—Woman	107	89.2%	230	54.2%	556	66.3%
2—Both present	3	2.5%	28	6.6%	81	9.7%

^a Table values are N and column % for respective predictors and covariates.

^b P-value is for χ² test.