Table 5 Chest x ray abnormalities by exposure categories.
| Fibrotic changes | ||
|---|---|---|
| n (%) | OR (95%CIs) | |
| Control | 6 (2.9) | 1.00 |
| Exposed | ||
| Total | 22 (3.7) | 1.78 (0.68–4.60) |
| Current status* | ||
| Production | 8 (5.6) | 1.87 (0.63–5.57) |
| Development | 5 (4.4) | 1.64 (0.58–7.05) |
| Maintenance | 9 (2.7) | 1.53 (0.48–4.86) |
| Cumulative status | ||
| 1–10 | 9 (3.4) | 1.59 (0.54–4.69) |
| 11–20 | 9 (3.1) | 1.44 (0.48–4.29) |
| 21+ | 4 (14.8) | 4.66 (1.21–17.89) |
| Confounder | ||
| Age | – | 1.99 (1.33–2.98) |
*Production: toner production; development: machine development; maintenance: machine maintenance.
Figures represent the number of subjects who had chest x ray abnormalities. The prevalence is also shown in parentheses. The odds ratio (OR) and 95% confidence interval were obtained after adjustment for age in multiple logistic regression analysis.