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  • 1.
    Eliasson, Kristina
    et al.
    School of Technology and Health, KTH Royal Institute of Technology, Huddinge, Sweden.
    Palm, Peter
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Arbets- och miljömedicin.
    Nyman, Teresia
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Arbets- och miljömedicin. School of Technology and Health, KTH Royal Institute of Technology, Huddinge, Sweden.
    Forsman, Mikael
    IMM Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, Sweden.
    Inter- and intra-observer reliability of risk assessment of repetitive work without an explicit method2017Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 62, s. 1-8Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A common way to conduct practical risk assessments is to observe a job and report the observed long term risks for musculoskeletal disorders. The aim of this study was to evaluate the inter- and intra-observer reliability of ergonomists' risk assessments without the support of an explicit risk assessment method. Twenty-one experienced ergonomists assessed the risk level (low, moderate, high risk) of eight upper body regions, as well as the global risk of 10 video recorded work tasks. Intra-observer reliability was assessed by having nine of the ergonomists repeat the procedure at least three weeks after the first assessment. The ergonomists made their risk assessment based on his/her experience and knowledge. The statistical parameters of reliability included agreement in %, kappa, linearly weighted kappa, intraclass correlation and Kendall's coefficient of concordance. The average inter-observer agreement of the global risk was 53% and the corresponding weighted kappa (K-w) was 0.32, indicating fair reliability. The intra-observer agreement was 61% and 0.41 (K-w). This study indicates that risk assessments of the upper body, without the use of an explicit observational method, have non-acceptable reliability. It is therefore recommended to use systematic risk assessment methods to a higher degree.

  • 2.
    Jackson, Jennie A.
    et al.
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för medicinska vetenskaper, Arbets- och miljömedicin. Univ Gavle, Dept Occupat & Publ Hlth Sci, Ctr Musculoskeletal Res, SE-80176 Gavle, Sweden..
    Mathiassen, Svend Erik
    Univ Gavle, Dept Occupat & Publ Hlth Sci, Ctr Musculoskeletal Res, SE-80176 Gavle, Sweden..
    Liv, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Centrum för klinisk forskning, Gävleborg. Univ Gavle, Dept Occupat & Publ Hlth Sci, Ctr Musculoskeletal Res, SE-80176 Gavle, Sweden..
    Observer performance in estimating upper arm elevation angles under ideal viewing conditions when assisted by posture matching software2016Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 55, s. 208-215Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Selecting a suitable body posture measurement method requires performance indices of candidate tools. Such data are lacking for observational assessments made at a high degree of resolution. The aim of this study was to determine the performance (bias and between- and within-observer variance) of novice observers estimating upper arm elevation postures assisted by posture matching software to the nearest degree from still images taken under ideal conditions. Estimates were minimally biased from true angles: the mean error across observers was less than 2. Variance between observers was minimal. Considerable variance within observers, however, underlined the risk of relying on single observations. Observers were more proficient at estimating 0 and 90 postures, and less proficient at 60. Thus, under ideal visual conditions observers, on average, proved proficient at high resolution posture estimates; further investigation is required to determine how non-optimal image conditions, as would be expected from occupational data, impact proficiency.

  • 3. Jackson, Jennie A.
    et al.
    Mathiassen, Svend Erik
    Wahlstrom, Jens
    Liv, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Centrum för klinisk forskning, Gävleborg.
    Forsman, Mikael
    Digging deeper into the assessment of upper arm elevation angles using 0 Cross Mark standard inclinometry2015Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 51, s. 102-103Artikel i tidskrift (Refereegranskat)
  • 4. Jackson, Jennie A.
    et al.
    Mathiassen, Svend Erik
    Wahlstrom, Jens
    Liv, Per
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska och farmaceutiska vetenskapsområdet, centrumbildningar mm, Centrum för klinisk forskning, Gävleborg.
    Forsman, Mikael
    Is what you see what you get?: Standard inclinometry of set upper arm elevation angles2015Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 47, s. 242-252Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Previous research suggests inclinometers (INC) underestimate upper arm elevation. This study was designed to quantify possible bias in occupationally relevant postures, and test whether INC performance could be improved using calibration. Participants were meticulously positioned in set arm flexion and abduction angles between 0 degrees and 150 degrees. Different subject-specific and group-level regression models comprising linear and quadratic components describing the relationship between set and INC-registered elevation were developed using subsets of data, and validated using additional data. INC measured arm elevation showed a downward bias, particularly above 600. INC data adjusted using the regression models were superior to unadjusted data; a subject-specific, two-point calibration based on measurements at 0 and 900 gave results closest to the 'true' set angles. Thus, inclinometer measured arm elevation data required calibration to arrive at 'true' elevation angles. Calibration to a common measurement scale should be considered when comparing arm elevation data collected using different methods.

  • 5. Kindblom-Rising, Kristina
    et al.
    Wahlström, Rolf
    Uppsala universitet, Medicinska och farmaceutiska vetenskapsområdet, Medicinska fakulteten, Institutionen för folkhälso- och vårdvetenskap, Allmänmedicin och preventivmedicin.
    Nilsson-Wikmar, Lena
    Buer, Nina
    Nursing staff's movement awareness, attitudes and reported behaviour in patient transfer before and after an educational intervention2011Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 42, nr 3, s. 455-463Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The objective was to evaluate changes after a two half-day patient transfer course regarding nursing staffs movement and body awareness, attitudes, reported behaviour, strain, disorder and sick leave. The course aimed at increasing staffs self-awareness of movements and body, and their communication competence, with the intention to promote the patient's independent mobility. Ninety-nine staff in an intervention group and 77 staff in two control groups answered a questionnaire before and after the intervention. After one year there was a significant increase in the number of instructions given and nursing staff's movement awareness in the intervention group compared to the control group. Reported physical disorders decreased significantly in the intervention group compared with both control groups. Increased movement awareness and frequent use of instructions during transfers may encourage patients to move independently and thereby reduce the strain in nursing staff.

  • 6.
    Rumar, Kåre
    Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Samhällsvetenskapliga fakulteten.
    Effectiveness of old, new, and future motor-car lighting1971Ingår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 2, nr 2, s. 99-103Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this article results have been reported from experiments carried out by the Traffic Safety Research Group, University of Uppsala, Sweden. The philosophy behind the research was to try to adapt the lighting conditions in night driving to human visual characteristics.

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