Background The objective of this study was to analyze the association between calf circumference and incontinence in Chinese elderly, and to find out the maximal cut-off point by gender for the use of calf circumference in screening for incontinence. Methods In this study, participants were from the 2018 Chinese Longitudinal Healthy Longevity Survey (CLHLS). The maximal calf circumference cut-off point and other incontinence-related risk factors were explored using receiver operating characteristic (ROC) curves and logistic regression analysis. Results The study included 14,989 elderly people (6,516 males and 8,473 females) over 60. The prevalence of incontinence in elderly males was 5.23% (341/6,516), significantly lower than females, which was 8.31% (704/8,473) (p < 0.001). There was no correlation between calf circumference < 34 cm in males and < 33 cm in females and incontinence after adjusting the confounders. We further stratified by gender to predict incontinence in elderly based on the Youden index of ROC curves. We found the association between calf circumference and incontinence was the strongest when the cut-off points were < 28.5 cm for males and < 26.5 cm for females, with an odds rate (OR) value of 1.620 (male, 95%CI: 1.197–2.288) and 1.292 (female, 95%CI: 1.044–1.600) after adjusting the covariates, respectively. Conclusions Our study suggests that calf circumference < 28.5 cm in males and < 26.5 cm in females is a risk factor for incontinence in the Chinese elderly population. Calf circumference should be measured in routine physical examination, and timely interventions should be made to reduce the risk of incontinence in subjects with calf circumference less than the threshold.

No abstract

No abstract

No abstract

Since fitness influencer has begun to impose their impact on audience through various media, it raises a question about what attributes may get these influencers more appealing to their audience. To delve into such question, this paper constructed a theory model invovling three-dimension attributes, perceived value and the behavior intention based on S-O-R theory. After conducting analyses such as structural equation model analysis on the collected data from the survey, we are positive that there is a positive relationship between these three concepts. In other words, influencers certain attributes does arouse audience intention to follow such a healthy lifestyle through their perceived value.