Determination of sciatica in epidemiologic research.

Area of Science:

• Occupational Health
• Epidemiology
• Musculoskeletal Disorders

Background:

• International Classification of Diseases (ICD) is inadequate for degenerative back disease etiology research.
• Cross-sectional studies can identify back disease symptoms but lack data collection guidelines.
• Establishing reliable methods to validate reported symptoms with clinical findings is crucial.

Purpose of the Study:

• To validate reported sciatic pain using clinical examination findings in occupationally active men.
• To assess the effectiveness of specific clinical tests in identifying back disease in high-risk populations.

Main Methods:

• Examined 252 reinforcement workers and 231 painters (men, 20-64 years) using nine clinical tests.
• Assessed reported sciatica and clinical findings related to lumbar movement (bending forward/sideward).
• Calculated sensitivity and specificity for individual tests and combined test pairs.

Main Results:

• Sciatica reports in reinforcement workers correlated with specific clinical findings.
• Individual tests for lumbar movement restriction/pain showed moderate sensitivity (0.36–0.61) and high specificity (0.82–0.87).
• Combining tests improved sensitivity (0.62–0.68) but decreased specificity (0.77–0.78).

Conclusions:

• A structured inquiry into recent sciatic pain, supported by lumbar movement clinical tests, is recommended.
• These methods are valuable for studying back syndromes in physically demanding trades.
• Current diagnostic classifications are insufficient for detailed etiological research in occupational back disease.