Longitudinal trajectories of physical activity in women using latent class growth analysis:The WIN Study  

用隐匿类型发展分析研究女性体力活动的纵向轨迹:女性损伤研究（英文）

作　　者：Youngdeok Kim Minsoo Kang Anna M.Tacón James R.Morrow Jr 

机构地区：[1]Department of Kinesiology and Sport Management,Texas Tech University [2]Department of Health and Human Performance,Middle Tennessee State University [3]Department of Kinesiology,Health Promotion,and Recreation,University of North Texas

出　　处：《Journal of Sport and Health Science》2016年第4期410-416,共7页运动与健康科学（英文）

基　　金：supported by the grant from the National Institutes of Health–National Institute of Arthritis and Musculoskeletal and Skin Diseases(No.R01 AR052459)

摘　　要：Purpose：This study aimed（1） to examine the longitudinal trajectories in objectively measured physical activity（PA）;（2） to identify unknown（i.e.,latent） subgroups with distinct trajectories;and（3） to examine the correlates of latent subgroups among community dwelling women.Methods：The study sample included a total of 669 women from the Women＇s Injury Study,a 5-year prospective cohort study conducted from2007 in the Southwest Central region of the US.Pedometer-based step-count data across 18 consecutive months were fitte to a latent growth model（LGM） and a latent class growth model（LCGM）.Baseline characteristics were regressed on latent class membership.Results：The longitudinal change in PA was best fi to a piecewise LGM with seasonal transitions.Significant y increased and decreased levels of PA were observed during the spring,fall,and winter,respectively（p〈0.001）.Three latent subgroups with distinct PA trajectories were identifie（low-active（46.8%）,somewhat-active（41.3%）,and active（11.9%））.Age and body fat percentage at the baseline significant y explained the likelihoods of being in low-active subgroup.Conclusion：Seasonal variations in PA among women were observed but may not be practically significant A relatively large portion of the sample showed low levels of PA for long periods.Intervention strategies should be considered for women who are overweight or obese,and aged 〉40 years old to promote PA during the life course.目的:本研究旨在客观测量体力活动以确定纵向轨迹;通过不同轨迹识别未知分组;检测社区居住女性中隐匿分组的关系。方法:研究样本包括来自"女性损伤研究"的669名女性。该研究是2007年在美国西南部中心地区进行的一项为期5年的前瞻性群组研究。研究将计步器连续18个月测得的计步数据拟合成一个隐匿发展模型和一个隐匿类型发展模型;对隐匿类型成员的基线特征进行回归分析。结果:体力活动的纵向变化随季节的转换很好地适应分段隐匿发展模型。在春、秋、冬季分别观察到体力活动水平明显提高和降低(p<0.001)。确定体力活动轨迹不同的3个隐匿分组:低活跃组(46.8%)、一般活跃组(41.3%)、活跃组(11.9%)。基线年龄和体脂百分比对低活跃组形成的可能性予以充分解释。结论:尽管可以确认女性体力活动的季节性变化,但变化并不明显。相对较大部分的样本显示女性体力活动长期处于低水平。对超重或肥胖以及年龄大于40岁的女性应进行适当干预,以提高其体力活动水平。

关 键 词：FEMALE PEDOMETER Prospective cohort SEASON Step-count 

分 类 号：G804.49[文化科学—运动人体科学]