Cross-Sectional Studies That Found No Association between Occupational Exposure and CTS
| Study | No. of Patients | Setting of Study | Measurement of Occupational Exposure | CTS Diagnostic Criteria | Controlling of Confounding Factors | Findings | Comment |
|---|---|---|---|---|---|---|---|
| Chiang et al22 | 207 | Fish processing workers | Observation and EMG force recording | S, PE | Age, gender | No association with repetition on the exposure group | Excluded the subjects with medical condition that can cause CTS |
| English et al., 199524 | 1167 | Orthopedic clinic | Self-report | Not specified | Gender, height, weight | No association with wrist ergonomics | |
| Moore et al23 | 230 | Pork processing plant | Observation | S, PE, NCV | No | No association | Based on the medical records review |
| Nathan et al17 | 471 | Employees from 27 occupations in 4 industries | Observation by investigators | NCV | Age, gender | No association between occupational hand activity and NCV finding | Case definition does not include symptom, physical examination |
| Schottland et al19 | 178 | Poultry-processing plant | Employment status, not observation | NCV | Age, gender | No association between employment experience and the NCV finding | Case definition does not include symptom, physical examination |
| Steven et al27 | 257 | Orthopedic clinic | Not specified | S, PE, NCV | No | No association |
CTS, carpal tunnel syndrome; EMG, electromyelogram; S, self-report; PE, physical examination; NCV, nerve conduction velocity.