Perceived contra observed physical work load in Swedish dentists.

In an earlier questionnaire study, dentists reported high experienced physical work load in their profession, but low to moderate complaints from their musculoskeletal system. The correlation between reported physical work load and pain from the musculoskeletal system was weak. This discrepancy could not be satisfactorily explained. Therefore, a second study was undertaken, in which the same 27 dentists who reported musculoskeletal problems were video recorded during one hour of clinical work, and the records were later analyzed using PEO (Portable Ergonomic Observation). PEO is a frequency analysis method which allows observation of work in real time using a portable computer or video recordings. PEO can be adjusted for registration of single or multiple work operations. Output data are presented as frequency, duration, and sequence of the various work operations. The aim of the present study was to investigate if there was a relation between observed work load recorded with PEO, and subjectively estimated work load and musculoskeletal complaints recorded with a questionnaire based on Visual Analogue Scales. Sitting and standing postures, and head, trunk and arm movements were analyzed. The PEO observations showed that dentists generally perform their clinical work in a sitting position, with the head bent forward almost half of the time. Only weak to moderate correlations (r =0.0-0.6) were found between observed physical work load and subjective estimations of experienced physical work load and musculoskeletal complaints. These findings support the results in our previous study, but they do not explain the large difference between the observed low work load and the subjectively experienced high work load. The study will be followed up by EMG measurements and free interviews, where both muscular load and psychosocial factors will be evaluated.

Construct validity of the instrument DOA: a dialogue about ability related to work.

This study examined the construct validity of the newly developed instrument A Dialogue About Ability Related To Work (DOA). DOA [18] was developed using concepts from the Model of Human Occupation [20] as theoretical framework. The instrument assumes the assessment of work ability by both the client and the occupational therapist, and is followed by a dialogue which is expected to distinguish possible goal-setting for further rehabilitation [18,19]. Twenty-one professionals and 126 clients from three clinics in Sweden participated in the study. All clients were involved as outpatients in psychiatric work rehabilitation in county councils or community services. Results of a Rasch analysis test indicated that items are well separated and generally work together in five unidimensional continuums to measure work ability. Twenty-nine of 34 items showed goodness-of-fit statistics, which means acceptable infit MnSq values from > or = 0.6 to < or = 1.4 in association with Z values from -2 to 2. The five misfit items have to be revised. The study has indicated that DOA is a valid instrument in psychiatric work rehabilitation and ought to be useful in the dialogue between occupational therapists and clients about goalsetting and treatment planning.

Experience of musculo-skeletal disorders, intensity of pain, and general conditions in work -- The case of employees in non-private dental clinics in a county in southern Sweden.

OBJECTIVES: (1) To identify perceived musculo-skeletal disorders and intensity of pain among the employees in the non-private dental clinics; (2) To assess perceived psychosocial and physical work conditions on the localization and intensity of musculo-skeletal disorders and pain. STUDY DESIGN: A questionnaire, comprising four sections (demographic, self-reported psychosocial and physical work conditions, self-reported disorders from the musculo-skeletal system, self-reported intensity of pain on nine different localization on the body) was mailed to 391 employees. Of these, 338 reported musculo-skeletal disorders. In this latter group, 239 reported work as the cause. These employees completed the questionnaire. RESULTS: The greatest amount of pain was reported for the cervico-brachial region. Among all participants, a response pattern was found where the physical work demands were very high, the psychosocial work demands fairly high, the work climate supportive, and the control over work moderate. At an occupational group level, theoretical inconsistencies were identified in terms of a lack of anticipated relationships, especially for the dentist groups. CONCLUSIONS: For a scientific and social purpose, more research, which identifies relationships between work-related musculo-skeletal pain and dos-response [8], effort-reward [16], and demand-control [12] aspects of the working conditions, is clearly needed.