Table 3. Self-reporting work-related respiratory and cardiovascular symptoms developed after employed in nanomaterials handling plants stratified by risk levels.
| Variables | Prevalence |
Self-reporting work-related |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Control (n=200) |
Risk Level 1 (n=139) |
Risk Level 2 (n=119) |
p-value* | Control (n=200) |
Risk Level 1 (n=139) |
Risk Level 2 (n=119) |
p-value* | ||||||||||||
| n | (%) | n | (%) | n | (%) | n | % | n | % | n | % | ||||||||
| Respiratory symptoms (not related to URI) | |||||||||||||||||||
| Dry cough | 24 | 12.1% | 19 | 13.7% | 20 | 16.8% | 0.49 | 3 | 1.5% | 8 | 5.8% | 7 | 5.9% | 0.06 | |||||
| Productive cough | 14 | 7.0% | 16 | 11.6% | 11 | 9.2% | 0.35 | 0 | 0.0% | 3 | 2.2% | 3 | 2.5% | 0.09 | |||||
| Wheezing | 4 | 2.0% | 1 | 0.7% | 1 | 0.8% | 0.51 | 0 | 0.0% | 0 | 0.0% | 1 | 0.8% | 0.24 | |||||
| Chest tightness | 20 | 10.1% | 8 | 5.8% | 10 | 8.4% | 0.37 | 7 | 3.5% | 3 | 2.2% | 4 | 3.4% | 0.76 | |||||
| Shortness of breath | 14 | 7.0% | 2 | 1.5% | 3 | 2.5% | 0.02 | 2 | 1.0% | 1 | 0.7% | 2 | 1.7% | 0.75 | |||||
| Sneezing | 35 | 17.6% | 25 | 18.0% | 23 | 19.3% | 0.93 | 4 | 2.0% | 11 | 7.9% | 7 | 5.9% | 0.04 | |||||
| Rhinitis | 22 | 11.1% | 14 | 10.1% | 15 | 12.6% | 0.81 | 2 | 1.0% | 6 | 4.3% | 3 | 2.5% | 0.15 | |||||
| Nose obstruction | 30 | 15.1% | 23 | 16.6% | 21 | 17.7% | 0.83 | 5 | 2.5% | 7 | 5.0% | 4 | 3.4% | 0.46 | |||||
| Rhinorrhea | 30 | 15.1% | 18 | 13.0% | 19 | 16.0% | 0.77 | 3 | 1.5% | 8 | 5.8% | 5 | 4.2% | 0.10 | |||||
| Cardiovascular symptoms | |||||||||||||||||||
| Chest oppression, pain, burning sensation | 10 | 5.1% | 7 | 5.0% | 8 | 6.7% | 0.79 | 3 | 1.5% | 1 | 0.7% | 3 | 2.5% | 0.50 | |||||
| Chest pain with radiation to left arm, shoulder, chin or back | 6 | 3.0% | 5 | 3.6% | 4 | 3.4% | 0.96 | 4 | 2.0% | 3 | 2.2% | 3 | 2.5% | 0.95 | |||||
| Sweating, nausea, vomiting, dizziness and irritable, in addition to chest pain | 5 | 2.5% | 1 | 0.7% | 6 | 5.1% | 0.09 | 2 | 1.0% | 1 | 0.7% | 4 | 3.4% | 0.16 | |||||
| Unexpected chest pain, without resolve after 10 to 15 min rest | 1 | 0.5% | 1 | 0.7% | 7 | 5.9% | <0.001 | 0 | 0.0% | 1 | 0.7% | 1 | 0.8% | 0.45 | |||||
*p value for χ2 test