Table 1 Identification and summary of retrospective cohort studies on the incidence of KD in workers exposed and unexposed to hand-arm vibrations
Reference | Professional sector | Country | Number of workers | Number of KD cases among exposed | Control group | Diagnostic criteria | Anamnesis | Clinical examination | Exposition period | Confounding variables | Author's conclusion regarding a causal relationship |
|---|---|---|---|---|---|---|---|---|---|---|---|
Decoulx P, 1957 | underground workers | France | 1 330 | 9 | none | pa x-ray | none | yes | 10, 13 and 13 years | 5 with trauma anamnesis, 1 without exposition to vibrations | no |
Roche,1961 | underground workers | France | 250 | 2 | none | not specified | partially interviewed | partially | not specified | not specified | no |
Kumlin, 1973 | chain saw worker | Finland | 35 | 1 | age-matched from the radiological archives | pa and lat. x-ray | not specified | not specified | not specified | not specified | yes |
Horváth, 1973 | chain saw worker | Hungary | 450 | 6 | 450 age-matched | pa x-ray | none | none | 5, 7, 8 and 9 years | 2 out of 6 with trauma anamnesis | yes |
Laitinen, 1974 | chain saw worker | Finland | 359 | 7 | none | pa x-ray | questionnaire | none | not specified | not specified | yes |
Suzuki, 1978 | chain saw worker | Japan | 580 | 0 | 90 forestry workers | pa and lat. x-ray | none | none | not specified | not specified | no |
Härkönen, 1984 | chain saw worker | Finland | 279 | 3 | 178 peat bog workers | pa x-ray | Interview | yes | on average 10.4 years | 4 out of 5 with trauma anamnesis | no |
Total: | 1953 | 28 |