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Vasospasm in the feet in workers assessed for HAVS.

Authors
House-R; Jiang-D; Thompson-A; Eger-T; Krajnak-K; Sauvé-J; Schweigert-M
Source
Occup Med 2011 Mar; 61(2):115-120
NIOSHTIC No.
20038565
Abstract
BACKGROUND: Previous studies have suggested that the presence of the vascular component of hand-arm vibration syndrome (HAVS) in the hands increases the risk of cold-induced vasospasm in the feet. AIMS: To determine if objectively measured cold-induced vasospasm in the hands is a risk factor for objectively measured cold-induced vasospasm in the feet in workers being assessed for HAVS. METHODS: The subjects were 191 male construction workers who had a standardized assessment for HAVS including cold provocation digital photocell plethysmography of the hands and feet to measure cold-induced vasospasm. Bivariate analysis and multinomial logistic regression were used to examine the association between plethysmographic findings in the feet and predictor variables including years worked in construction, occupation, current smoking, cold intolerance in the feet, the Stockholm vascular stage and plethysmographic findings in the hands. RESULTS: Sixty-one (32%) subjects had non-severe vasospasm and 59 (31%) had severe vasospasm in the right foot with the corresponding values being 57(30%) and 62 (32%) in the left foot. Multinomial logistic regression indicated that the only statistically significant predictor of severe vasospasm in the feet was the presence of severe vasospasm in the hands (OR: 4.11, 95% CI: 1.60-10.6, P < 0.01 on the right side and OR: 4.97, 95% CI: 1.82-13.53, P < 0.01 on the left side). Multinomial logistic regression analysis did not indicate any statistically significant predictors of non-severe vasospasm in the feet. CONCLUSIONS: Workers assessed for HAVS frequently have cold-induced vasospasm of their feet. The main predictor of severe vasospastic foot abnormalities is severe cold-induced vasospasm in the hands.
Keywords
Vibration-disease; Vibration-effects; Vibration-exposure; Vibration; Hand-injuries; Arm-injuries; Workers; Cardiovascular-system-disorders; Construction-workers; Humans; Men; Demographic-characteristics; Epidemiology; Statistical-analysis; Author Keywords: Feet; hand-arm vibration; occupational; vasospasm
Contact
R. House, Department of Occupational and Environmental Health, St Michael's Hospital, 30 Bond Street, Toronto, Ontario, M5B 1W8, Canada
CODEN
OCMEE8
Publication Date
20110301
Document Type
Journal Article
Email Address
houser@smh.toronto.on.ca
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0962-7480
NIOSH Division
HELD
Source Name
Occupational Medicine
State
WV
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