Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Chronobiol Int. 2011 Apr;28(3):229-37. doi: 10.3109/07420528.2011.553696.
This study presents the Circadian Energy Scale (CIRENS), a very short and simple chronotype measurement tool based on energy. The CIRENS consists of two introspective questions about the usual energy level (very low, low, moderate, high, or very high, scored 1 to 5) in the morning and in the evening. The difference between energy level scores (-4 to 4) felt by respondents in the evening and morning defines the chronotype score and classification. A concurrent validity analysis of the CIRENS with the widely used Horne and Östberg Morningness-Eveningness Questionnaire (MEQ) was conducted using a sample of 225 college students, and with MSFsc, a sleep-based chronotype assessment tool based on the Munich Chronotype Questionnaire (MCTQ), using a sample of 34,530 subjects (18-83 yrs, 27% males). This large sample was collected in a Web survey for behavioral correlates of the CIRENS with variables previously associated with chronotype differences. The correlation of the CIRENS chronotype score was r = -.70 with the MEQ and r = .32 with the MSFsc. CIRENS chronotype scores declined with age and were not affected by sex. Both CIRENS and MSFsc chronotype scores were related to differences in tobacco, caffeine, and cola soft-drink consumption (all higher in evening types). The CIRENS provides a simple chronotype index and a measure of absolute energy throughout the day and seems to be a reliable chronotype assessment tool that may be useful both clinically and for large-scale studies.
本研究提出了 Circadian Energy Scale（CIRENS），这是一种非常简短且简单的基于能量的生物钟测量工具。CIRENS 由两个关于早晨和晚上通常能量水平（非常低、低、中等、高或非常高，得分 1 到 5）的内省问题组成。受访者在晚上和早晨感受到的能量水平得分差异（-4 到 4）定义了生物钟得分和分类。使用 225 名大学生的样本，对 CIRENS 与广泛使用的 Horne 和 Östberg 晨型-晚型问卷（MEQ）进行了同时效度分析，并使用基于慕尼黑生物钟问卷（MCTQ）的睡眠型生物钟评估工具 MSFsc，对 34,530 名受试者（18-83 岁，27%男性）进行了分析。这项大型样本是通过网络调查收集的，调查了 CIRENS 与先前与生物钟差异相关的变量的行为相关性。CIRENS 生物钟得分与 MEQ 的相关性为 r = -.70，与 MSFsc 的相关性为 r =.32。CIRENS 生物钟得分随年龄下降，不受性别影响。CIRENS 和 MSFsc 生物钟得分都与烟草、咖啡因和可乐软饮料消费的差异有关（所有这些在晚型人中都较高）。CIRENS 提供了一种简单的生物钟指数和全天的绝对能量测量方法，似乎是一种可靠的生物钟评估工具，在临床和大规模研究中都可能有用。
