Wennman Heini, Kronholm Erkki, Partonen Timo, Peltonen Markku, Vasankari Tommi, Borodulin Katja
a National Institute for Health and Welfare , Helsinki , Finland and.
b UKK-Institute for Health Promotion and Research , Tampere , Finland.
Chronobiol Int. 2015;32(8):1090-100. doi: 10.3109/07420528.2015.1063061. Epub 2015 Aug 28.
Circadian typology is a latent trait that is usually assessed with scoring on a series of questions thought to represent the construct. But, in the classification, most people fall into the intermediate type, i.e. neither a definite morning nor an evening type, but still showing stronger preference towards either end of the continuum. Our aim was to operationalize chronotype using latent class analysis (LCA) for a 6-item scale derived from the original Horne-Östberg Morningness-Eveningness Questionnaire to compare and understand characteristics of chronotype in a population-based sample of adults in Finland. A total of 4904 men and women aged 25-74 years were included. We also analyzed the associations of chronotypes with physical activity (PA) and sitting. We found five latent chronotype groups including "rested more-evening type" (28%), "rested more-morning type" (24%), "morning type" (23%), "tired more-evening type" (17%) and "evening type" (8%) groups. Operationalization of chronotype by LCA suggests that morning alertness is an important feature differentiating chronotypes. Further, the "evening type" and the "tired, more-evening type" had higher odds for none to very low as well as low PA, as compared to "morning type". In addition, "evening type" was associated with higher odds for more time spent sitting, as compared to "morning type". Our findings indicate that it is important to assess sleep schedules and morning tiredness, which then could be targeted as a potential mediating factor for health behaviors, in particular, PA and health status.
昼夜节律类型是一种潜在特质，通常通过对一系列被认为能代表该结构的问题进行评分来评估。但是，在分类中，大多数人属于中间类型，即既不是明确的早晨型也不是夜晚型，但仍对连续体的两端表现出更强的偏好。我们的目的是使用潜在类别分析（LCA）对源自原始霍恩 - 奥斯特伯格晨型 - 夜型问卷的6项量表进行操作化，以比较和理解芬兰成年人群体样本中昼夜节律类型的特征。总共纳入了4904名年龄在25 - 74岁之间的男性和女性。我们还分析了昼夜节律类型与身体活动（PA）和久坐的关联。我们发现了五个潜在的昼夜节律类型组，包括“睡眠较多 - 夜晚型”（28%）、“睡眠较多 - 早晨型”（24%）、“早晨型”（23%）、“疲劳较多 - 夜晚型”（17%）和“夜晚型”（8%）组。通过LCA对昼夜节律类型进行操作化表明，早晨警觉性是区分昼夜节律类型的一个重要特征。此外，与“早晨型”相比，“夜晚型”和“疲劳较多 - 夜晚型”在无到极低以及低PA方面的几率更高。此外，与“早晨型”相比，“夜晚型”在久坐时间更长方面的几率更高。我们的研究结果表明，评估睡眠时间表和早晨疲劳很重要，然后可以将其作为健康行为（特别是PA和健康状况）的潜在中介因素加以关注。
