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Kuster, R. P., Grooten, W. J., Baumgartner, D., Blom, V., Hagströmer, M. & Ekblom, Ö. (2020). Detecting Prolonged Sitting Bouts with the ActiGraph GT3X.. Scandinavian Journal of Medicine and Science in Sports, 30(3), 572-582
Open this publication in new window or tab >>Detecting Prolonged Sitting Bouts with the ActiGraph GT3X.
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2020 (English)In: Scandinavian Journal of Medicine and Science in Sports, ISSN 0905-7188, E-ISSN 1600-0838, Vol. 30, no 3, p. 572-582Article in journal (Refereed) Published
Abstract [en]

The ActiGraph has a high ability to measure physical activity, however, it lacks an accurate posture classification to measure sedentary behaviour. The aim of the present study was to develop an ActiGraph (waist-worn, 30Hz) posture classification to detect prolonged sitting bouts, and to compare the classification to proprietary ActiGraph data. The activPAL, a highly valid posture classification device, served as reference criterion.1 Both sensors were worn by 38 office workers over a median duration of 9 days. An automated feature selection extracted the relevant signal information for a minute based posture classification. The machine-learning algorithm with optimal feature number to predict the time in prolonged sitting bouts (≥5 and ≥10 minutes) was searched and compared to the activPAL using Bland-Altman statistics. The comparison included optimised and frequently used cut-points (100 and 150 counts-per-minute (cpm), with and without low-frequency-extension (LFE) filtering). The new algorithm predicted the time in prolonged sitting bouts most accurate (bias ≤7 minutes/day). Of all proprietary ActiGraph methods, only 150 cpm without LFE predicted the time in prolonged sitting bouts non-significantly different from the activPAL (bias ≤18 minutes/day). However, the frequently used 100 cpm with LFE accurately predicted total sitting time (bias ≤7 minutes/day). To study the health effects of ActiGraph measured prolonged sitting, we recommend using the new algorithm. In case a cut-point is used, we recommend 150 cpm without LFE to measure prolonged sitting, and 100 cpm with LFE to measure total sitting time. However, both cpm cut-points are not recommended for a detailed bout analysis.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2020
Keywords
Automated Feature Selection, Bout Analysis, Machine Learning, Posture Prediction, Sedentary Behaviour, activPAL
National Category
Occupational Health and Environmental Health
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5934 (URN)10.1111/sms.13601 (DOI)000503822900001 ()31743494 (PubMedID)
Available from: 2019-12-02 Created: 2019-12-02 Last updated: 2020-02-24Bibliographically approved
Blom, V., Kallings, L., Ekblom, B., Wallin, P., Andersson, G., Hemmingsson, E., . . . Ekblom Bak, E. (2020). Self-Reported General Health, Overall and Work-Related Stress, Loneliness, and Sleeping Problems in 335,625 Swedish Adults from 2000 to 2016.. International Journal of Environmental Research and Public Health, 17(2), Article ID E511.
Open this publication in new window or tab >>Self-Reported General Health, Overall and Work-Related Stress, Loneliness, and Sleeping Problems in 335,625 Swedish Adults from 2000 to 2016.
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2020 (English)In: International Journal of Environmental Research and Public Health, ISSN 1661-7827, E-ISSN 1660-4601, Vol. 17, no 2, article id E511Article in journal (Refereed) Published
Abstract [en]

The prevalence of poor health, in particular stress-related mental ill-health, is increasing over time and birth cohorts. As rapid societal changes have occurred in the last decade and still are occurring, there is an interest in investigating the trends in health-related factors. The aim of the present study was to investigate trends in self-reported general health, overall stress, work-related stress, feelings of loneliness, and sleeping problems in 335,625 Swedish adults across categories of gender, geographic regions, length of education, and age from 2000 to 2016. On population level, sleeping problems and poor general health have increased markedly and significantly, while experiences of work stress decreased between 2000 and 2016 (p < 0.05). Overall stress and level of loneliness were unchanged (p > 0.05). The risk of having ≥3 symptoms (any of poor or very poor general health, often or very often perceived overall stress, loneliness, or sleeping problems) has increased significantly from 2000 to 2016 (ß = 1034 (1027-1040)). This increase was significantly higher in young (ß = 1052 (1038-1065)) and individuals with lower education (ß = 1056 (1037-1076)) compared to older and high length of education.

Place, publisher, year, edition, pages
MDPI, 2020
Keywords
loneliness, public health, self-reported health, sleeping problems, stress, working population
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-6007 (URN)10.3390/ijerph17020511 (DOI)31947519 (PubMedID)
Projects
HPI-gruppen
Available from: 2020-01-28 Created: 2020-01-28 Last updated: 2020-01-29
Mather, L., Narusyte, J., Ropponen, A., Bergström, G., Blom, V., Helgadóttir, B. & Svedberg, P. (2020). Sick leave due to mental disorders, morbidity and mortality: a prospective study of discordant twin pairs.. Social Psychiatry and Psychiatric Epidemiology, 55(1), 25-32
Open this publication in new window or tab >>Sick leave due to mental disorders, morbidity and mortality: a prospective study of discordant twin pairs.
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2020 (English)In: Social Psychiatry and Psychiatric Epidemiology, ISSN 0933-7954, E-ISSN 1433-9285, Vol. 55, no 1, p. 25-32Article in journal (Refereed) Published
Abstract [en]

PURPOSE: To investigate if sick leave due to mental disorders increases the risk of morbidity measured by inpatient and specialized outpatient care, and mortality among women and men, independent of familial factors.

METHODS: An open cohort study of 4979 twin pairs discordant for sick leave due to mental disorders was conducted in 2005-2013. Twins were followed up in the cause of death and national patient registries until the end of study, emigration, death, and inpatient and specialized outpatient care. Conditional Cox proportional hazard regression, adjusting for the familial factors shared by the twins, was used to calculate hazard ratios (HR) with 95% confidence intervals (CI). In case of non-proportional hazards, time-varying covariates were used.

RESULTS: Sick leave due to mental disorders increased the risk for inpatient care among men (HR: 1.90, CI 1.66-2.17) and women (HR: 1.39, CI 1.27-1.51). For men, the risk of outpatient care was higher the first 2 years (HR: 2.08, CI 1.87-2.31), after which it was attenuated (HR: 1.32, CI 1.02-1.70). For women, the HR was 1.57 (CI 1.47-1.68) for the whole study time. There was an increased risk of death among men (HR: 2.91, CI 1.70-4.99), but not among women (HR: 0.84, CI 0.53-1.35).

CONCLUSIONS: Sick leave due to mental disorders was a risk factor for mortality for men only, and increased the risk of inpatient and specialized outpatient care among both women and men, but the risks were higher for men when stratifying for sex.

Place, publisher, year, edition, pages
Springer, 2020
Keywords
Ambulatory care, Hospitalization, Mental disorders, Mortality, Sick leave, Twin study
National Category
Psychiatry
Research subject
Social Sciences/Humanities
Identifiers
urn:nbn:se:gih:diva-5744 (URN)10.1007/s00127-019-01715-9 (DOI)31076801 (PubMedID)
Available from: 2019-05-20 Created: 2019-05-20 Last updated: 2020-01-16
Larsson, K., Kallings, L., Ekblom, Ö., Blom, V., Andersson, E. & Ekblom, M. (2019). Criterion validity and test-retest reliability of SED-GIH, a single item question for assessment of daily sitting time.. BMC Public Health, 19(1), Article ID 19:17.
Open this publication in new window or tab >>Criterion validity and test-retest reliability of SED-GIH, a single item question for assessment of daily sitting time.
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2019 (English)In: BMC Public Health, ISSN 1471-2458, E-ISSN 1471-2458, Vol. 19, no 1, article id 19:17Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Sedentary behaviour has been closely linked to metabolic and cardiovascular health and is therefore of importance in disease prevention. A user-friendly tool for assessment of sitting time is thus needed. Previous studies concluded that the present tools used to assess a number of sedentary behaviours are more likely to overestimate sitting than single-item questions which often underestimate sitting time, and that categorical answering options are recommended. In line with this, the single-item question with categorical answering options, SED-GIH, was developed. The aim of this study was to investigate the criterion validity of the SED-GIH question using activPAL3 micro as the criterion measure. The second aim was to evaluate the test-retest reliability of the SED-GIH questionnaire.

METHOD: In the validity section of this study, 284 middle-aged adults answered a web questionnaire, which included SED-GIH, wore activPAL and filled in a diary log for one week. Spearman's rho assessed the relationship between the SED-GIH answers and the daily average sitting time as monitored by the activPAL (activPAL-SIT), a Weighted Kappa assessed the agreement, ANOVA assessed differences in activPAL-SIT between the SED-GIH answer categories, and a Chi2 compared the proportions of hazardous sitters between the different SED-GIH answer categories. In the reliability section, 95 elderly participants answered the SED-GIH question twice, with a mean interval of 5.2 days. The reliability was assessed with ICC and a weighted Kappa.

RESULTS: The SED-GIH question correlated moderately with activPAL-SIT (rho = 0.31), with a poor agreement (weighted Kappa 0.12). In total, 40.8% underestimated and 22.2% overestimated their sitting time. The ANOVA showed significant differences in activPAL-SIT between the different SED-GIH answer categories (p < 0.001). The Chi2 showed a significant difference in proportion of individuals sitting more than 10 h per day within each SED-GIH answer category. ICC for the test-retest reliability of SED-GIH was excellent with ICC = 0.86, and the weighted Kappa showed an agreement of 0.77.

CONCLUSIONS: The unanchored single item SED-GIH question showed excellent reliability but poor validity in the investigated populations. Validity and reliability of SED-GIH is in line with other questionnaires that are commonly used when assessing sitting time.

Place, publisher, year, edition, pages
BioMed Central, 2019
Keywords
Adults, Office-based work, Older adults, Reliability, Sedentary behaviour, Sitting, Validity, activPAL
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5520 (URN)10.1186/s12889-018-6329-1 (DOI)30611226 (PubMedID)
Available from: 2019-01-08 Created: 2019-01-08 Last updated: 2019-01-08
Svedberg, P., Helgadóttir, B., Mather, L., Narusyte, J., Ropponen, A. & Blom, V. (2019). Do poor health behaviors have an impact on the transition from sick leave to disability pension?. In: European Journal of Public Health: Volume 29, Supplement 4, November 2019. Paper presented at 12th European Public Health Conference Building bridges for solidarity and public health Marseille, France 20th–23rd November 2019 (pp. 66-66). Oxford University Press, 29
Open this publication in new window or tab >>Do poor health behaviors have an impact on the transition from sick leave to disability pension?
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2019 (English)In: European Journal of Public Health: Volume 29, Supplement 4, November 2019, Oxford University Press, 2019, Vol. 29, p. 66-66Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Background: High age, being a woman, and having low socioeconomic status are among the important risk factors for transitioning from sickness absence (SA) to disability pension (DP). But, little is known about the effect of poor health behaviors, although there are indications that poor health behaviors increase the risk of both SA and DP. The aims were to study the associations between three poor health behaviors (current smoking, high alcohol consumption and low physical activity levels) and DP among individuals who recently been sickness absent, and to explore whether having multiple poor health behaviors increased the risk of transitioning from SA to DP. Methods: This prospective cohort study included 1991 twin individuals aged 20-46 who participated in a survey in 2005 and who had been on long-term SA in the two years preceding baseline (date of answering the survey) data collection of health behaviors (smoking, alcohol and physical activity) and relevant covariates. The participants were followed up for incident all-cause DP until the 31st of December 2012 (mean follow-up 5.2 years). National register data of SA and DP were used, and the association between each health behavior and DP was estimated using Cox proportional hazards regression analyses. The results are presented as Hazard Ratios (HR) with 95% Confidence Intervals (CI). Results: Results showed that compared to never smoking, current smoking was associated with a higher risk of transitioning from SA to DP (HR 1.76, 95%CI 1.08-2.84). Alcohol use, lack of physical activity or having several poor health behaviors showed no significant associations. Conclusions: Being a current smoker influences the risk of transitioning from SA to DP. Poor health behaviors are well established risk factors for poor physical and mental health. Hence, from a public health perspective it is important to emphasize the value of improving health behaviors in general but also among people with a history of SA. [ABSTRACT FROM AUTHOR]

Place, publisher, year, edition, pages
Oxford University Press, 2019
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5942 (URN)10.1093/eurpub/ckz185.165 (DOI)
Conference
12th European Public Health Conference Building bridges for solidarity and public health Marseille, France 20th–23rd November 2019
Available from: 2019-12-02 Created: 2019-12-02 Last updated: 2019-12-04Bibliographically approved
Nooijen, C. F., Blom, V., Ekblom, Ö., Ekblom, M. & Kallings, L. (2019). Improving office workers' mental health and cognition: a 3-arm cluster randomized controlled trial targeting physical activity and sedentary behavior in multi-component interventions. BMC Public Health, 19, Article ID 266.
Open this publication in new window or tab >>Improving office workers' mental health and cognition: a 3-arm cluster randomized controlled trial targeting physical activity and sedentary behavior in multi-component interventions
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2019 (English)In: BMC Public Health, ISSN 1471-2458, E-ISSN 1471-2458, Vol. 19, article id 266Article in journal (Refereed) Published
Abstract [en]

Background

Physically inactive and sedentary lifestyles are negatively related to both mental health and cognition. For office-workers, who spend two-thirds of their workday sitting, it is important to improve these lifestyles. The aim of this study is to assess the effectiveness of multi-component interventions, incorporating individual, environmental and organizational changes, to increase physical activity or reduce sedentary behavior among office-workers in order to improve mental health and cognition.

Methods

a 3-arm, clustered randomized controlled trial (RCT) with waiting list control group amongst adult office-workers of two large Swedish companies. Cluster teams will be randomized into 6-month interventions or to a passive waiting list control group which will receive the allocated intervention with a 6-month delay. Two multicomponent interventions will be studied of which one focuses on improving physical activity and the other on reducing sedentary behavior. Both interventions include 5 sessions of motivational counselling. In the physical activity intervention persons also get access to a gym and team leaders will organize lunch walks and encourage to exercise. In the sedentary behavior intervention standing- and walking meetings will be implemented and team leaders will encourage to reduce sitting. The recruitment target is 110 office-workers per arm (330 in total). Measurements will be repeated every 6months for a total intended duration of 24months. Proximal main outcomes are physical activity measured with accelerometers and sedentary behavior with inclinometers. Distal outcomes are self-reported mental health and a cognition test battery. Additional outcomes will include cardiovascular fitness, body composition, sleep, self-reported physical activity and sedentary behavior, other health habits, physical health, and working mechanisms from blood samples and questionnaires.

Discussion

This cluster RCT will contribute to the currently available evidence by comparing the effectiveness of multi-component interventions targeting physical activity or sedentary behavior with the end goal of improving mental health and cognition. This study is strong in its cluster randomized design, numerous objective outcome measures and long-term follow-up. The exact content of the interventions has been defined by combining theory with results from a larger research project as well as having a continuous dialogue with the involved companies.

Place, publisher, year, edition, pages
Springer, 2019
National Category
Public Health, Global Health, Social Medicine and Epidemiology
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5646 (URN)10.1186/s12889-019-6589-4 (DOI)000460405200003 ()30836957 (PubMedID)
Projects
Fysisk aktivitet och hälsosamma hjärnfunktioner bland kontorsarbetare: Delprojekt 3, Långsiktiga interventioner
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-08-06
Larsson, K., Ekblom, Ö., Kallings, L., Ekblom, M. & Blom, V. (2019). Job Demand-Control-Support Model as Related to Objectively Measured Physical Activity and Sedentary Time in Working Women and Men.. International Journal of Environmental Research and Public Health, 16(18), Article ID E3370.
Open this publication in new window or tab >>Job Demand-Control-Support Model as Related to Objectively Measured Physical Activity and Sedentary Time in Working Women and Men.
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2019 (English)In: International Journal of Environmental Research and Public Health, ISSN 1661-7827, E-ISSN 1660-4601, Vol. 16, no 18, article id E3370Article in journal (Refereed) Published
Abstract [en]

A physically active lifestyle incurs health benefits and physically active individuals show reduced reactivity to psychosocial stressors. However, the findings are inconclusive and are based on self-reported physical activity and sedentary time. The present study aimed at studying the associations between psychological stressors (job demand, control, support, JD-C-S) and objectively measured physical activity (PA) on various intensities from sedentary (SED) to vigorous physical activity. The participants were 314 employees from a cross-sectional study. PA data were collected with the accelerometer ActiGraph GT3X (Pensacola, FL, USA), SED data with the inclinometer activPAL (PAL Technologies Ltd., Glasgow, Scotland, UK), and psychosocial stressors with a web questionnaire. Results showed that vigorous-intensity PA was negatively associated with demand (β -0.15, p < 0.05), even when adjusted for the covariates. SED was negatively associated to support (β -0.13, p < 0.05). Stress significantly moderated relations between support and sedentary time (β -0.12, p < 0.05). Moderate PA (MVPA) was negatively associated with demand, but only when controlling for overtime (β -0.13, p < 0.05). MVPA was also negatively associated with control (β -0.15, p < 0.05) but not when work engagement was included in the model. Being more physically active and spending less time sedentary may help to handle job situations with high demand and low support.

Place, publisher, year, edition, pages
MDPI, 2019
Keywords
ActiGraph, activPAL, job demand-control-support model, physical activity, questionnaire, sedentary time, workplace
National Category
Sport and Fitness Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5858 (URN)10.3390/ijerph16183370 (DOI)000489178500144 ()31547253 (PubMedID)
Projects
Fysisk aktivitet och hälsosamma hjärnfunktioner bland kontorsarbetare: Delprojekt 1, Tvärsnittsstudie
Available from: 2019-09-26 Created: 2019-09-26 Last updated: 2019-10-29
Larsson, K., Ekblom, Ö., Kallings, L., Ekblom, M. & Blom, V. (2019). Job demands control model as related to objectively measured physical activity and sitting time in working women and men. In: : . Paper presented at 19th EAWOP (European Association for Work & Organizational Psychology) Congress, 29th May – 1st June 2019, Turin, ITALY.
Open this publication in new window or tab >>Job demands control model as related to objectively measured physical activity and sitting time in working women and men
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2019 (English)Conference paper (Other academic)
National Category
Health Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-6003 (URN)
Conference
19th EAWOP (European Association for Work & Organizational Psychology) Congress, 29th May – 1st June 2019, Turin, ITALY
Available from: 2020-01-21 Created: 2020-01-21 Last updated: 2020-01-21Bibliographically approved
Salier Eriksson, J., Ekblom Bak, E., Blom, V., Kallings, L., Ekblom, Ö., Hemmingsson, E., . . . Lindwall, M. (2019). Latent profiles of sedentary time, exercise and cardiorespiratory fitness in adults, and the associations with metabolic and percieved health. In: : . Paper presented at EuroPrevent 2019. 11-13 April 2019, Lisbon, Portugal.
Open this publication in new window or tab >>Latent profiles of sedentary time, exercise and cardiorespiratory fitness in adults, and the associations with metabolic and percieved health
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2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Health Sciences
Research subject
Medicine/Technology; Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-6000 (URN)
Conference
EuroPrevent 2019. 11-13 April 2019, Lisbon, Portugal
Available from: 2020-01-21 Created: 2020-01-21 Last updated: 2020-01-21Bibliographically approved
Hemmingsson, E., Ekblom, Ö., Kallings, L., Andersson, G., Wallin, P., Söderling, J., . . . Ekblom Bak, E. (2019). Objectively measured prevalence and time trends of obesity and severe obesity in 447 925 Swedish adults, 1995-2017. In: : . Paper presented at EuroPrevent 2019. 11-13 April 2019, Lisbon, Portugal.
Open this publication in new window or tab >>Objectively measured prevalence and time trends of obesity and severe obesity in 447 925 Swedish adults, 1995-2017
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2019 (English)Conference paper, Poster (with or without abstract) (Other academic)
National Category
Health Sciences
Research subject
Medicine/Technology
Identifiers
urn:nbn:se:gih:diva-5998 (URN)
Conference
EuroPrevent 2019. 11-13 April 2019, Lisbon, Portugal
Available from: 2020-01-20 Created: 2020-01-20 Last updated: 2020-01-20Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-0079-124x

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