The effectiveness of ergonomic interventions in material handling operations

This study evaluated the effectiveness of ergonomic interventions in material handling operations involving 33 employers and 535 employees from 2012 to 2017. Outcomes included employee-reported low back/upper extremity pain and safety incidents at baseline, every three months, and annually for up to two years. A total of 32.5% of employees completed at least one survey, while 13.6% completed all nine surveys over two years. Among highly exposed employees (who reported handling >= 50 lbs. > 33% of the time), upper extremity pain frequency and severity were lower among those who reported using the intervention routinely versus those that reported using their body strength alone to handle objects >= 50 lbs. After excluding from analyses one employer that used anti-fatigue mats, low back pain frequency was also significantly lower among highly exposed intervention users. In conclusion, there was some evidence that the interventions were effective in reducing employee-reported pain for highly exposed employees.

Factors Associated With Hand and Upper Arm Functional Disability in People With Rheumatoid Arthritis: A Systematic Review

OBJECTIVE

This original systematic review aimed to summarize evidence within observational studies on the factors associated with hand functional disability in adults with rheumatoid arthritis (RA).

METHODS

A rigorous extensive systematic literature search was conducted in 6 medical databases for peer-reviewed English language observational studies that explore the factors associated with hand function for people with RA. Factors were critically classified under the domains of the International Classification of Functioning, Disability and Health (ICF) framework and health-related factors. The methodologic quality was determined using the appraisal tool for cross-sectional studies. Factors related to hand function that were investigated in ≥2 studies were explored using a best-evidence synthesis.

RESULTS

Twenty articles from 1,271 citations met the inclusion criteria. All presented cross-sectional data (5 high-quality and 15 low-quality articles), resulting in limited evidence in the best-evidence synthesis. For the factors classified under the ICF domains, the best-evidence synthesis indicated that a diverse range of positive and negative factors were associated with hand function. However, key factors were hand strength, disease activity, and pain intensity. It is evident that few sociodemographic factors have been explored for the association with hand function.

CONCLUSION

Although the level of evidence was limited, modifiable factors such as grip strength, disease activity, and pain were identified as the most influential factors on hand function in people with RA. The findings of the present review indicate that important sociodemographic factors that impact hand function in individuals with RA have not yet been considered or reported in clinical research.

Outcome Measures for People with Scleroderma: Relationships between Measures of Impairment and Activity Limitation

This study examined the relationships between impairment and activity limitation outcome measures in people with scleroderma. Forty people with scleroderma received evaluations of body structure and function variables: grip and pinch strength (Arthritis Hand Function Test), dexterity (nine-hole pegboard), joint motion (Hand Mobility in Scleroderma and Keital Function Test) and skin thickness. The participants also completed self-report questionnaires regarding activity limitations (Health Assessment Questionnaire, Hand Functional Disability Scale and Scleroderma Functional Assessment Questionnaire).

All grip and pinch strength and dexterity measures correlated significantly but moderately with the activity limitation measures (r = 0.34 to 0.62). The Keital Function Test correlated with the activity limitation measures (r = 0.43 to 0.49) whereas the Hand Mobility in Scleroderma test and skin thickness did not. The results demonstrated that the activity limitations reported by the participants were only partly associated with the impairment variables. The findings from this study might help occupational therapists to decide where to focus intervention and which measures to use when assessing the effectiveness of occupational therapy for people with scleroderma.

Education, self-management, and upper extremity exercise training in people with rheumatoid arthritis: a randomized controlled trial

OBJECTIVE

To evaluate the effectiveness of a brief supervised education, self-management, and global upper extremity exercise training program, supplementing a home exercise regimen, for people with rheumatoid arthritis (RA; the Education, Self-Management, and Upper Extremity Exercise Training in People with Rheumatoid Arthritis [EXTRA] program).

METHODS

Adults with RA of ≤5 years' duration were randomized to receive either usual care or the EXTRA program comprising 4 (1-hour) group education, self-management, and global upper extremity exercise training sessions supplementing the first 2 weeks of a 12-week individualized, functional home exercise regimen in addition to usual care. Outcome measures were assessed at baseline, 12 weeks (primary end point), and 36 weeks and included the Disabilities of the Arm, Shoulder, and Hand questionnaire (primary outcome measure), the Grip Ability Test, handgrip strength (N), the Arthritis Self-Efficacy Scale (pain, function, and symptoms subscales), and the 28-joint Disease Activity Score.

RESULTS

One hundred eight participants (26 men, mean ± SD age 55 ± 15 years, mean ± SD disease duration 20 ± 19 months) were randomized to receive either usual care (n = 56) or the EXTRA program (n = 52). At 12 weeks, there was a significant between-group difference in the mean change in disability (-6.8 [95% confidence interval (95% CI) -12.6, -1.0]; P = 0.022), function (-3.0 [95% CI -5.0, -0.5]; P = 0.011), nondominant handgrip strength (31.3N [95% CI 9.8, 52.8]; P = 0.009), self-efficacy (10.5 [95% CI 1.6, 19.5]; P = 0.021 for pain and 9.3 [95% CI 0.5, 18.2]; P = 0.039 for symptoms), and disease activity (-0.7 [95% CI -1.4, 0.0]; P = 0.047), all favoring the EXTRA program.

CONCLUSION

The EXTRA program improves upper extremity disability, function, handgrip strength, and self-efficacy in people with RA, with no adverse effects on disease activity.