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Biomedical subjects

B Radosević-Vidacek

Publications and source records attributed to B Radosević-Vidacek.

12 recordsLinked to original sources
PubMed1999

Bibliographic output of the Institute for Medical Research and Occupational Health in Zagreb between 1994 and 1998.

This paper brings a classification of the bibliographic output of the Institute for Medical Research and Occupational Health over the period 1994-1998 into fourteen main categories according to the type of publication and its coverage in different bibliographic databases. The academic staff was classified according to scientific fields in which they received the bachelor's degree and in which they were appointed into a scientific grade. The authors compared the Institute's scientific performance in the last five years to previous periods and with achievements of similar institutions in Croatia. Regardless of a large decrease in the Institute's personnel, the number of scientists with a Ph.D. degree remained unaltered. The ratio between published papers covered by Current Contents and the number of scientists holding a Ph.D. degree slightly dropped, while the ratio between the publication of conference abstracts and Ph.D.s doubled.

Academies and Institutes↗
PubMed1994

[Chronobiologic features in a 12-hour working day].

A review of investigations into the effects of 12-hour workdays indicates that the extended workday is frequently related to decrement of performance efficiency, alertness and safety, and to increased subjective fatigue during work. Fatigue is increased even more during night shift work. As sleep duration after the night shift is also reduced, combined effects of fatigue and sleep debt can increase the risk of accidents, especially when workers work more nights in a row. In spite of the increased feeling of fatigue the workers prefer longer working hours to an eight-hour working schedule, because they have more free time to use for restitution, leisure and other domestic and second job activities.

Circadian Rhythm↗
PubMed1994

Compensation of reduced sleep in a rapidly rotating shift system.

Sleep characteristics were examined in various phases of a forward rapidly rotating shift cycle in two groups of workers. In view of the fact that age is related to both sleep duration and the incidence of napping the relationships between sleep characteristics were analysed with age statistically held constant. The results showed that reduced sleep duration in one phase of the shift cycle (morning or night shift) was compensated by prolonged sleep in the following phase (afternoon shift and days off). Sleep was not prolonged equally for different workers; those sleeping shorter in the previous phase of the shift cycle prolonged their sleep more while those sleeping longer in the previous phase prolonged their sleep less. There was no relationship between the duration of the main sleep and the incidence of napping. The results are considered to be an additional argument in favour of the rapidly rotating shift system as compared to the permanent or slowly rotating shift systems.

Adult↗
PubMed1992

[Interindividual differences in personality and behavior and subjective health problems in shift workers].

A total of 604 experienced shift workers were administered a battery of questionnaires in order to examine the relationships between the shift workers' features and subjective health complaints taken as signs of intolerance to shift work. The individual difference measures included: hard-driving and competitiveness, speed and impatience, relaxed, efficiency, flexibility of behaviour, evening, rigidity of sleeping habits, vigorous, languidness, inveterate, flexibility of habits, neuroticism, extraversion, lie-scale, age and work experience. The subjective health complaints included: generally poor health, musculo-skeletal, respiratory and psychosomatic-digestive complaints, and digestive problems. Correlation and multiple regression analyses showed that in workers some personality features and patterns of behaviour were related to the subjective health complaints. More health complaints were placed by workers who were emotionally unstable, less relaxed, inefficient, rigid (e.g. unable to control the behavioral arousal level), hard-driving and competitive, speedy and impatient (A-types), rigid in sleeping and other life habits, languid, older and with longer shift work experience.

Adult↗
PubMed1992

[Recommendations in relation to shift work].

The purpose of the recommendations is to decrease as much as possible physiological, psychological and social problems connected with shift work. To achieve this goal working hours should be organized to take account of shift workers' tolerance to shift work. When recruiting new shift workers certain personal characteristics that make work in any shift work system inadvisable should be checked. As shift work can be considered to be an additional load, shift workers' health requires regular checking-up. If there are signs of health impairment, the workers should be removed from night shift work permanently or at least temporarily. The shift workers' free time should be arranged so as to facilitate recovery from shift work, especially after night shift. To decrease the workload during the night shift, if possible, workers should be given opportunity to take naps during work.

Humans↗
PubMed1992

[Interindividual differences in tolerance to shift work and characteristics of shift workers: relation between the quality and duration of sleep and certain worker characteristics].

The investigation aimed at examining the relationship between the quality and duration of sleep on the one hand and various shift workers' characteristics on the other, as well as establishing whether sleep characteristics were congruent with some other indices of night shift tolerance. A total of 604 rotating shift workers working in a fast rotating shift system were administered a battery of questionnaires. The results showed that sleep quality was related to their many characteristics, especially to neuroticism, rigidity of sleeping habits, flexibility of habits, and relaxedness. Actually, the shift workers' characteristics accounted for a notable percentage (48%) of interindividual differences in sleep quality. However, there were fewer traits related to sleep duration than to sleep quality so that only a small percentage of interindividual differences in sleep duration could be explained (12-30%). Sleep quality proved to be a good indicator of night shift tolerance. The results concerning sleep duration indicated only sleep duration on the afternoon shift and days off, as well as average sleep duration in the complete shift cycle, to be relatively good indices of night shift tolerance.

Adult↗
PubMed1991

[Characteristics of main and additional sleep time in workers on rotating shifts].

Various sleep characteristics were examined among rotating shift workers (n = 603) and control workers (n = 113). The results showed the shift workers to have poorer sleep quality than the control group. In addition their main sleep episode was shorter on morning shift and longer on days off in comparison to controls. Shift workers' main sleep length and frequency of napping were affected by the situation in which they were taken (morning, afternoon, night shift or days off). In the group of shift workers the short main sleep episode on morning and night shifts was compensated by longer sleep on afternoon shift and days off. The short night shift sleep was additionally compensated by napping. However, naps taken on the morning shift did not prove to be compensatory. The length of the main sleep episode was affected by the situation in which sleep was taken also in the control group of workers. In this group only the longer main sleep episode on days off appeared to have a compensatory function for the short main sleep on working days. The relationship between sleep quality and main sleep duration was determined by the situation in which sleep was taken, while the relationship between sleep quality and napping was established only for the control group of workers.

Adult↗
PubMed1990

[Shift work and health problems in workers].

A comparative study of health complaints was performed in a large oil-refinery among a total of 609 shift workers and 97 non-shift workers. Health complaints were assessed on the basis of the workers' medical records, where details of every visit to the physician over a period of five years were noted, and as subjective health complaints obtained by a questionnaire. In general, the non-shift workers visited the physician more often than the shift workers. However, when visits to the physician for special groups of diseases were considered taking into account the overall number of visits, and especially when the subjective health complaints were compared between the two groups of workers, the results indicated that the shift workers were at greater risk of some diseases, especially the digestive ones.

Adult↗
PubMed1990

[The productivity of female shift workers].

The productivity of female shift workers, working on a weekly rotating three-shift system, was examined. The afternoon shift was found to be the most productive and the night shift the least productive one. The greatest difference in productivity between shifts was found in the first two days of the week, when the productivity on night shift was significantly lower than that on the other two shifts. From the third day on there were no longer significant differences in productivity between shifts. The most productive and the least productive workers on night shift did not significantly differ in extraversion or in sleep duration after the night shift. Family responsibility was found to be associated with the duration of sleep after the night shift: married women slept significantly shorter after the night shift than unmarried women. However, this difference in sleep duration was not associated with productivity on night shift. Sleep duration after the afternoon shift (8 hours 40 minutes) was on average two hours longer than after the other two shifts. The difference in sleep duration after different shifts, along with circadian variations in alertness, readiness for work and performance efficiency, could be responsible for differences in productivity between shifts.

Adult↗
PubMedDate not supplied

Individual differences in circadian rhythm parameters and short-term tolerance to shiftwork: a follow-up study.

The relationship between individual differences in the phase and amplitude of circadian rhythms and tolerance to shiftwork has been the subject of several studies. Those studies recorded circadian rhythms and shiftwork tolerance at approximately the same time. The present study aimed to examine the predictive relationships between the amplitude, phase, and mesor of 24 h rhythms obtained before exposure to shiftwork, and subsequent indices of tolerance measured after one and three years of shiftwork. The results revealed some stable relations between the various rhythm parameters and subsequent tolerance measures. Workers who had a higher mesor of positive moods, and a lower mesor of negative moods and fatigue, before entering shiftwork tended to tolerate shiftwork better. Further, those whose heart rate rhythm showed an earlier acrophase had better subsequent sleep quality scores, while those with a smaller amplitude of their temperature, negative mood and fatigue rhythms showed better night-shift tolerance.

Adult↗