Logistic regression of VWF symptoms and finger systolic blood pressure during local cooling to 10°C (FSBP%10°) on individual and exposure variables in the vibration exposed workers (n = 73)
| Predictors | VWF symptoms | FSBP%10° <60% | Zero FSBP%10° |
|---|---|---|---|
| OR (95% CI) | OR (95% CI) | OR (95% CI) | |
| FSBP%10° is dichotomised at either 60% of the pressure at 30°C or at zero value (closure of the digital arteries). The generalised estimating equations (GEE) method was used to account for correlation between repeated measures of both dependent and independent variables within subject during the follow up period. Odds ratios (OR) and robust 95% confidence intervals (95% CI) are shown. | |||
| Age (y) | 0.97 (0.92 to 1.03) | 0.95 (0.89 to 1.01) | 1.04 (0.95 to 1.12) |
| Smoking (pack-y) | 1.01 (0.99 to 1.03) | 1.00 (0.97 to 1.02) | 0.97 (0.94 to 1.01) |
| Daily vibration exposure (h) | 1.19 (1.01 to 1.41) | 1.06 (0.86 to 1.30) | 0.99 (0.74 to 1.31) |
| Follow up time (y) | 1.07 (0.97 to 1.19) | 1.15 (1.01 to 1.32) | 0.98 (0.80 to 1.20) |
| VWF symptoms (0 = no/1 = yes) | – | 4.24 (1.93 to 9.31) | 6.57 (1.95 to 22.1) |