Triceps skinfold thickness trajectories and the risk of all-cause mortality:A prospective cohort study

BACKGROUND The measurement of triceps skinfold(TSF)thickness serves as a noninvasive metric for evaluating subcutaneous fat distribution.Despite its clinical utility,the TSF thickness trajectories and their correlation with overall mortality have not been thoroughly investigated.AIM To explore TSF thickness trajectories of Chinese adults and to examine their associations with all-cause mortality.METHODS This study encompassed a cohort of 14747 adults sourced from the China Health and Nutrition Survey.Latent class trajectory modeling was employed to identify distinct trajectories of TSF thickness.Subjects were classified into subgroups reflective of their respective TSF thickness trajectory.We utilized multivariate Cox regression analyses and mediation examinations to explore the link between TSF thickness trajectory and overall mortality,including contributory factors.RESULTS Upon adjustment for multiple confounding factors,we discerned that males in the‘Class 2:Thin-stable’and‘Class 3:Thin-moderate’TSF thickness trajectories exhibited a markedly reduced risk of mortality from all causes in comparison to the‘Class 1:Extremely thin’subgroup.In the mediation analyses,the Geriatric Nutritional Risk Index was found to be a partial intermediary in the relationship between TSF thickness trajectories and mortality.For females,a lower TSF thickness pattern was significantly predictive of elevated all-cause mortality risk exclusively within the non-elderly cohort.CONCLUSION In males and non-elderly females,lower TSF thickness trajectories are significantly predictive of heightened mortality risk,independent of single-point TSF thickness,body mass index,and waist circumference.

The variation of skinfold thickness of Mulam adults in China

The skinfold thickness of six items （facial skinfold, subscapular skinfold, suprailiac skinfold, biceps skinfold, triceps skinfold and calf skinfold） were measured in 465 Mulam adults （232 male and 233 female）. The results were as follows： （1） The average skinfold thickness are higher in female at every age group. （2） As a whole, the skinfold thickness in the body of trunk is bigger than that in the limbs in both male and female. The curves of biceps skinfold thickness and calf skinfold thickness of male doesn＇t fluctuate with age. Body fat percentage of male was the lowest in the 30s group. In female, the skinfold thickness of trunk and triceps increase with age while calf skinfold decreases. Body fat percentage of female increases with age but then decreases after 50 years old. （3） The mean vales of Mulam skinfold thickness are relatively low compared with Daur, Uzbek and Han nationality.