Psychometric properties of Social Rhythm Metric in regular shift employees

Abstract

Objective: To analyze the psychometric properties of Brazilian version of Social Rhythm Metric-17 and to present the score algorithm in regular shift employees. Method: This is a cross-sectional study. The Social Rhythm Metric assess the regularity of daily life associated to changes in biological rhythms. The scale was applied, during nine days, to 145 employees, 27.6 % male and 72.4% female, ages between 18 and 60, mean = 36.1 (sd = 9.87). Mean values were compared using the Student's t-test for independent samples and ANOVA. Factor analysis was performed using principal component analysis; the reliability analysis, through Spearman's correlation. Results: The Student t test didn't reveal any significant difference between sex in IRA (t = 0.60; p = 0.55) or ETA (t = 0.67; p = 0.95). The factor analysis showed three components, the first was associated to survival related activities; the second, related to pleasure and work and the third was related to no essential survive activities. Discussion: This version of the Social Rhythm Metric-17 instrument allows to assess an important human zeitgeber, contributing for other studies which can to evaluate the determinant role of social rhythm. Conclusion: The Brazilian version of social rhythm metric 17 presents validity of content and good test-retest reliability. Atividades (t = 0,60; p = 0,55) e para o Escore do Total de Atividades (t = 0,67; p = 0,95 Descriptors

How do stress, sleep quality, and chronotype associate with clinically significant depressive symptoms? A study of young male military recruits in compulsory service

“…Another study from our group found that the regular activity of work days correlates with fewer minor psychiatric symptoms. 37 The results of the present study do not support an association between disrupted social rhythm and depressive symptoms. Certain methodological limitations might explain why we could not reproduce the previous findings.…”

Morningness–eveningness, use of stimulants, and minor psychiatric disorders among undergraduate students

“…The disruption of the sleep–wake cycle is one of the most prevalent complaints in clinical practice. Sleep deprivation due to clinical and psychiatric conditions, as well as lifestyle, is endemic in modern life (Schimitt et al., 2010). Another important characteristic concerns interindividual differences in sleep allocation due to a time‐dependent behavior, the morningness–eveningness dimension (Horne & Ostberg, 1976).…”

Social rhythm and other chronobiological findings in juvenile myoclonic epilepsy

“…Zeitgeber is a German word coined by Jurgen Aschoff in the 1970s which loosely translates as "synchronizer" and is used to designate exogenous factors (light, exercises, food, social cues) that can synchronize biological rhythms (Schimitt, Zanetti, et al 2010). In our study, social zeitgebers were assessed using the Social Rhythm Metric, which scores the regularity of daily life from 0 to 7 over a period of 7 days by simply counting activities during this period (Schimitt, Zanetti, et al 2010).…”

“…In our study, social zeitgebers were assessed using the Social Rhythm Metric, which scores the regularity of daily life from 0 to 7 over a period of 7 days by simply counting activities during this period (Schimitt, Zanetti, et al 2010). The activity-rest rhythm and degree of exposure to the photic zeitgeber were analyzed using an ACT10 ® actigraph with a built-in thermistor and lux meter.…”

“…Scores on the social rhythm metric were calculated using a specific algorithm (Schimitt, Zanetti, et al 2010). Actigraph data were read with actimeter software and interpreted using El Temps ® (Noguera) software to calculate the variables of temperature, light exposure, and rhythmic activity parameters, namely amplitude, mesor, and acrophase.…”