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Objective To characterize the sociodemographic aspects, work capacity and stress of nursing workers affected by musculoskeletal disorders and to analyze the association between musculoskeletal comorbidities, capacity, stress and social support. Methods Cross-sectional study, conducted in two hospitals in Manaus. The Work Capacity Index and the Job Stress Scale were used, translated and validated in nursing workers for more than one year, with musculoskeletal pain in the last three months, with a minimum duration of two hours. Results The study had a majority of women and technicians, aged 42 ± 10.7 years, with moderate capacity (34.7 ± 5.11) associated with musculoskeletal comorbidities. The stress affected 56% and the capacity correlated weak and inverse to stress and direct to the social support. Conclusions There was a predominance of women and technicians, and musculoskeletal pain was associated with a decrease in capacity. Social support was associated with increased capacity and decreased stress.

Objective to identify the occupational factors associated with low back pain using a surveillance tool and to characterize the low back pain by the resistance of the extensor muscles of the vertebral column among nursing professionals at an Intensive Care Unit. Methods Cross-sectional study. The workers answered a questionnaire about occupational factors and participated in a resistance test of the extensor muscles of the vertebral column. Associations were established through Student's T-test or Mann-Whitney's U-test and correlations using Pearson's test. Results Out of 48 participants, 32 (67%) suffered from low pain. For the resistance test, the subjects suffering from low back pain endured less time in comparison with asymptomatic subjects, but without significant differences (p=0.147). The duration of the pain episode showed a significant negative correlation (p=0.016) with the results of the resistance test though. The main factors identified as causes of low back pain were biomechanical and postural elements, conditions of the muscle structure and physical and organizational conditions. Conclusions the main occupational factors associated with the low back pain were the posture and the characteristics of the physical and organizational conditions. In addition, the extensor muscles of the column showed a trend towards lesser resistance for workers in pain. This evidence is important when considering prevention and treatment strategies.

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Objective to translate, adapt and test the psychometric properties of the Brazilian Nurse-Work Instability Scale.Method this was a methodological study following the translation steps: synthesis, back-translation, specialist´s committee, semantics analysis, pretest, and psychometric tests. The committee was composed of 5 specialists. For the semantics analysis, 18 nursing workers evaluated the instrument and 30 pretested it. For the psychometric tests, the sample size was 214 nursing workers. The internal construct validity was analyzed by the Rasch model. Reliability was assessed using internal consistency, and concurrent validity with Pearson’s correlation between the Nurse-Work Instability Scale, and the Work Ability Index, Job Stress Scale.Results a Nurse-Work Instability Scale in Brazilian Portuguese with 20 items showed an adequate reliability (0.831), stability (p <0.0001), and an expected correlation with Work Ability Index (r = -0.526; P<0.0001) and Job Stress Scale (r = 0.352; p <0.0001).Conclusion the instrument is appropriated to detect work instability in Brazilian nursing workers with musculoskeletal disorders. Its application is fundamental to avoid long-term withdrawal from work by early identification of the work instability. Furthermore, the scale can assist the development of actions and strategies to prevent the abandonment of the profession of nursing workers affected by musculoskeletal disorders.

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