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{"title"=>"Associations between diurnal 24-hour rhythm in ambulatory heart rate variability and the timing and amount of meals during the day shift in rotating shift workers", "type"=>"generic", "authors"=>[{"first_name"=>"Yoshizaki", "last_name"=>"T."}, {"first_name"=>"Midorikawa", "last_name"=>"T."}, {"first_name"=>"Hasegawa", "last_name"=>"K."}, {"first_name"=>"Mitani", "last_name"=>"T."}, {"first_name"=>"Komatsu", "last_name"=>"T."}], "year"=>2014, "source"=>"PloS one", "identifiers"=>{"issn"=>"1932-6203", "doi"=>"10.1371/journal.pone.0106643"}, "keywords"=>["*circadian rhythm sleep disorder", "*nurse", "*physiology", "adult", "autonomic nervous system", "caloric intake", "circadian rhythm", "electrocardiography", "feeding behavior", "female", "heart rate", "human", "male", "pathophysiology", "sleep"], "id"=>"fe8fa7a2-5ea9-3bb0-b539-de14d5f29612", "abstract"=>"It has not hitherto been clarified whether there is an association between dietary behavior and circadian variation in autonomic nervous system activity among shift workers. This study examines diurnal 24-h rhythm in heart rate variability (HRV) and dietary behavior among rotating shift workers, while taking into account the sleep-wake cycle and physical activity. The subjects were 11 female and 2 male nurses or caregivers working in a rotating 2-shift system at a health care facility. All the subjects were asked to undergo 24-h electrocardiograph and step count recordings, and to record the time of each meal and the amounts of each food and beverage consumed. Coarse graining spectral analysis was used for approximately 10-min segments of HRV to derive the total power (TOT: >0.04 Hz) of the periodic components and the integrated power of periodic components in the low-frequency (LF: 0.04-0.15 Hz) and high-frequency (HF: >0.15 Hz) ranges. Then the ratio of HF power to TOT (HF nu) and the ratio of LF power to HF power (LF/HF) were calculated to assess cardiac vagal tone and cardiac sympathovagal balance, respectively. Single cosinor analysis was used to obtain 24-h period variations in both variables of HRV. Acrophases of HF nu and LF/HF expressed in time since awakening were significantly (p<0.05) delayed for subjects having breakfast at a later time after awakening. Multivariable regression analysis indicated that the timing of breakfast, the ratio of energy intake at dinner to total energy intake, and total energy intake were correlated to the acrophases of HF nu and/or LF/HF. These results suggest that the phase angle between circadian variation in cardiac autonomic nervous system activity and the sleep-wake cycle may be associated with dietary behavior in shift workers.", "link"=>"http://www.mendeley.com/research/associations-between-diurnal-24hour-rhythm-ambulatory-heart-rate-variability-timing-amount-meals-dur", "reader_count"=>5, "reader_count_by_academic_status"=>{"Student > Ph. D. Student"=>3, "Student > Master"=>1, "Student > Doctoral Student"=>1}, "reader_count_by_user_role"=>{"Student > Ph. D. Student"=>3, "Student > Master"=>1, "Student > Doctoral Student"=>1}, "reader_count_by_subject_area"=>{"Nursing and Health Professions"=>1, "Agricultural and Biological Sciences"=>1, "Medicine and Dentistry"=>2, "Psychology"=>1}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>2}, "Psychology"=>{"Psychology"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>1}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}}, "group_count"=>0}

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• http://doi.org/10.1186/s40064-016-1932-z
• http://doi.org/10.1016/j.appet.2019.104411
• http://doi.org/10.1080/07420528.2016.1273942

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• {"files"=>["https://ndownloader.figshare.com/files/1673485"], "description"=>"<p>*p<0.05.</p>¶<p>Time since awakening.</p><p>Pearson correlation coefficients for acrophases of HRV variables.</p>", "links"=>[], "tags"=>["ratio", "shift workers", "health care facility", "hrv", "Multivariable regression analysis", "HF power", "Rotating Shift Workers", "Single cosinor analysis", "subject", "hz", "step count recordings", "circadian variation", "energy intake", "Heart rate variability", "tot", "Ambulatory Heart Rate Variability", "lf", "system activity", "HF nu"], "article_id"=>1168600, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Takahiro Yoshizaki", "Toru Midorikawa", "Kohe Hasegawa", "Takeshi Mitani", "Taiki Komatsu", "Fumiharu Togo"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0106643.t002", "stats"=>{"downloads"=>0, "page_views"=>20, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Pearson_correlation_coefficients_for_acrophases_of_HRV_variables_/1168600", "title"=>"Pearson correlation coefficients for acrophases of HRV variables.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-09-11 03:16:03"}
• {"files"=>["https://ndownloader.figshare.com/files/1673480"], "description"=>"<p>Values are mean ± SE. Ensemble-averaged fitted curves by using single cosinor analysis for early eaters (black line) and late eaters (red line) depending on breakfast timings according to time since awakening are also depicted. Data are double-plotted to better visualize rhythmicity. HF nu, the ratio of high frequency (HF: >0.15 Hz) power to total power (>0.04 Hz); LF/HF, the ratio of low frequency (LF: 0.04–0.15 Hz) power to HF power.</p>", "links"=>[], "tags"=>["ratio", "shift workers", "health care facility", "hrv", "Multivariable regression analysis", "HF power", "Rotating Shift Workers", "Single cosinor analysis", "subject", "hz", "step count recordings", "circadian variation", "energy intake", "Heart rate variability", "tot", "Ambulatory Heart Rate Variability", "lf", "system activity", "HF nu"], "article_id"=>1168595, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Takahiro Yoshizaki", "Toru Midorikawa", "Kohe Hasegawa", "Takeshi Mitani", "Taiki Komatsu", "Fumiharu Togo"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0106643.g001", "stats"=>{"downloads"=>1, "page_views"=>16, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Ensemble_averaged_step_counts_and_heart_rate_variability_variables_during_the_day_shift_over_24_h_/1168595", "title"=>"Ensemble-averaged step counts and heart rate variability variables during the day shift over 24 h.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-09-11 03:16:03"}
• {"files"=>["https://ndownloader.figshare.com/files/1673488"], "description"=>"<p>Model 1–4, adjusted by sex and BMI.</p><p>*p<0.05.</p>†<p>P-value < false discovery rate (FDR) threshold is significant. P-values which remain significant following FDR corrections for multiple comparisons are in bold.</p>¶<p>Time since awakening.</p><p>Multivariable linear regression analysis for the acrophases of HRV variables.</p>", "links"=>[], "tags"=>["ratio", "shift workers", "health care facility", "hrv", "Multivariable regression analysis", "HF power", "Rotating Shift Workers", "Single cosinor analysis", "subject", "hz", "step count recordings", "circadian variation", "energy intake", "Heart rate variability", "tot", "Ambulatory Heart Rate Variability", "lf", "system activity", "HF nu"], "article_id"=>1168603, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Takahiro Yoshizaki", "Toru Midorikawa", "Kohe Hasegawa", "Takeshi Mitani", "Taiki Komatsu", "Fumiharu Togo"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0106643.t003", "stats"=>{"downloads"=>5, "page_views"=>12, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Multivariable_linear_regression_analysis_for_the_acrophases_of_HRV_variables_/1168603", "title"=>"Multivariable linear regression analysis for the acrophases of HRV variables.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-09-11 03:16:03"}
• {"files"=>["https://ndownloader.figshare.com/files/1673483"], "description"=>"<p>Pearson correlation coefficients are presented.</p>", "links"=>[], "tags"=>["ratio", "shift workers", "health care facility", "hrv", "Multivariable regression analysis", "HF power", "Rotating Shift Workers", "Single cosinor analysis", "subject", "hz", "step count recordings", "circadian variation", "energy intake", "Heart rate variability", "tot", "Ambulatory Heart Rate Variability", "lf", "system activity", "HF nu"], "article_id"=>1168598, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Takahiro Yoshizaki", "Toru Midorikawa", "Kohe Hasegawa", "Takeshi Mitani", "Taiki Komatsu", "Fumiharu Togo"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0106643.g002", "stats"=>{"downloads"=>1, "page_views"=>12, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_The_relations_between_breakfast_time_the_ratio_of_energy_intake_at_dinner_to_total_energy_intake_E_and_total_energy_intake_and_the_acrophases_of_HF_nu_and_LF_HF_according_to_data_based_on_time_since_awakening_/1168598", "title"=>"The relations between breakfast time, the ratio of energy intake at dinner to total energy intake (E%), and total energy intake and the acrophases of HF nu and LF/HF according to data based on time since awakening.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-09-11 03:16:03"}
• {"files"=>["https://ndownloader.figshare.com/files/1673484"], "description"=>"<p>Values are shown as mean ± SD.</p><p>BMI, body mass index; RRI, R-R interval; HF nu, the ratio of high frequency (HF: >0.15 Hz) power to total power (>0.04 Hz); LF/HF, the ratio of low frequency (LF: 0.04–0.15 Hz) power to HF power.</p><p>*Significantly different between the groups (p<0.05).</p>†<p>Non-paired t test;</p>‡<p>Mann-Whitney U test;</p>§<p>Chi-squared test.</p>¶<p>Time since awakening.</p>a<p>The ratio of energy intake to total energy intake (E%).</p><p>General characteristic of subjects dichotomized into early eaters and late eaters depending on breakfast timing (median: 30 min).</p>", "links"=>[], "tags"=>["ratio", "shift workers", "health care facility", "hrv", "Multivariable regression analysis", "HF power", "Rotating Shift Workers", "Single cosinor analysis", "subject", "hz", "step count recordings", "circadian variation", "energy intake", "Heart rate variability", "tot", "Ambulatory Heart Rate Variability", "lf", "system activity", "HF nu"], "article_id"=>1168599, "categories"=>["Biological Sciences", "Science Policy"], "users"=>["Takahiro Yoshizaki", "Toru Midorikawa", "Kohe Hasegawa", "Takeshi Mitani", "Taiki Komatsu", "Fumiharu Togo"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0106643.t001", "stats"=>{"downloads"=>6, "page_views"=>20, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_General_characteristic_of_subjects_dichotomized_into_early_eaters_and_late_eaters_depending_on_breakfast_timing_median_30_min_/1168599", "title"=>"General characteristic of subjects dichotomized into early eaters and late eaters depending on breakfast timing (median: 30 min).", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-09-11 03:16:03"}

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Relative Metric

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F1000Prime