Psy 552 Ergonomics & BiomechanicsLecture 20

MSDs “A descriptor for disorders and diseases of the

musculoskeletal system having proven or hypothetical work related causal components”

The concept is similar to: … … … …

MSD Modeling Dose-Response…

Biomechanically…

Job design and stress model…

MSD Information Progression…

Classification…

Diagnosis…

MSD research evaluation Selection bias…

Response bias…

Confounding…

Misclassification bias…

MSD research evaluation (cont.) Generalizability…

Sample size…

MSD research methods Experiments

Observational studies… … … … …

Prospective cohort

Case-control design

Cross-sectional studies

Case-series study

Exposure measurements Bernard et al. (1994)…

Fransson-Hall et al. (1995)…

Aspects of the MSD literature Association between disease and work

exposure…

Temporality…

Specificity…

Consistency…

Aspects of the MSD literature (cont.) Predictability…

Consistency of findings

The NIOSH categories…

Tendon Disorders Tendonitis and tenosynovitis – inflammation

of the tendon or synovial membrane of the tendon sheath.

Locations…

Peripheral nerve disorders Mechanical nerve entrapment…

Tension neck syndrome Symptoms:

Diagnosis:

Affected population:

Prediction:

Tension neck syndrome (cont.) Consistency of association:

Causal factors:

Work relatedness:

Shoulder tendonitis Symptoms:

Diagnosis:

Affected population:

Prediction:

Shoulder tendonitis (cont.) Consistency of association:

Causal factors:

Work relatedness:

Epicondylitis Symptoms:

Diagnosis:

Affected population:

Prediction:

Epicondylitis (cont.) Consistency of association:

Causal factors:

Work relatedness:

Carpal tunnel syndrome Symptoms:

Diagnosis:

Affected population:

Prediction:

Carpal tunnel syndrome (cont.) Consistency of association:

Causal factors:

Work relatedness:

De Quervains tendonitis Symptoms:

Diagnosis:

Affected population:

Prediction:

De Quervains tendonitis (cont.) Consistency of association:

Causal factors:

Work relatedness:

Hand arm vibration syndrome Symptoms:

Diagnosis:

Affected population:

Prediction:

Hand arm vibration syndrome (cont.) Consistency of association:

Causal factors:

Work relatedness:

Dupuytren’s contracture Symptoms:

Diagnosis:

Affected population:

Prediction:

Dupuytren’s contracture (cont.) Consistency of association:

Causal factors:

Work relatedness:

Achilles tendonitis Symptoms:

Diagnosis:

Affected population:

Prediction:

Achilles tendonitis (cont.) Consistency of association:

Causal factors:

Work relatedness:

Thoracic outlet syndrome Symptoms:

Diagnosis:

Affected population:

Prediction:

Thoracic outlet syndrome (cont.) Consistency of association:

Causal factors:

Work relatedness:

Radiculopathy Symptoms:

Diagnosis:

Affected population:

Prediction:

Radiculopathy (cont.) Consistency of association:

Causal factors:

Work relatedness:

Osteoarthritis Symptoms:

Diagnosis:

Affected population:

Prediction:

Osteoarthritis (cont.) Consistency of association:

Causal factors:

Work relatedness:

Hypothenar hammer syndrome Symptoms:

Diagnosis:

Affected population:

Prediction:

Hypothenar hammer syndrome (cont.) Consistency of association:

Causal factors:

Work relatedness:

Knee bursitis Symptoms:

Diagnosis:

Affected population:

Prediction:

Knee bursitis (cont.) Consistency of association:

Causal factors:

Work relatedness: