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Table 2 Hand-arm vibration exposure in relation to prospective white fingers.

From: Incidence of Raynaud's phenomenon in relation to hand-arm vibration exposure among male workers at an engineering plant a cohort study

Variable

Event

Censored

Ratio

95% Hazard Ratio Confidence Limits

Non-exposed = 0–1600 h · m/s2

10

75

1

NA

Quartile 1 = 1601–3520 h · m/s2

3

22

1.02

0.28 – 3.71

Quartile 2= 3521–7070 h · m/s2

5

20

1.77

0.61 – 5.19

Quartile 3= 7071–18086 h · m/s2

4

21

1.37

0.43 – 4.382

Quartile 4 = >18086 h · m/s2

6

19

2.15

0.78 – 5.91

  1. Prospective dose-response analysis Cox regression Hand-arm vibration exposure dose was defined as the product of exposure hours and the hand-arm vibration exposure value, unit hours · m/s2 (h · m/s2).
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Journal of Occupational Medicine and Toxicology

ISSN: 1745-6673