Table 1.
Characteristics of additive manufacturing (AM) subjects and controls in the study.
| AM operators | Controls n = 20 | ||
|---|---|---|---|
| All (n = 18) | FDM/ME (n = 10) | ||
| Sex (f/m) | 1/17 | 1/9 | 7/13 |
| Age (years) | 33 (31, 43) | 33 (31, 42) | 40 (36, 46) |
| BMI (kg/m2) | 25.4 (23.0, 31.4) | 24.6 (22.5, 28.1) | 24.4 (22.1, 25.9) |
| Smoking | |||
| Current smoker (“do you smoke every day?”) | 0 | 0 | 0 |
| Occasional smoker (“do you smoke at parties?”) | 5 | 2 | 1 |
| Former smoker | 3 | 2 | 3 |
| Never smoked | 10 | 6 | 16 |
| Physician-diagnosed asthma (yes/no) | 3 | 1 | 1 |
| Prevalence of respiratory symptoms for the past 12 months | |||
| Nose problems* | 6 | 3 | 8 |
| Dry cough | 2 | 0 | 1 |
| Trouble with breathing | 0 | 0 | 0 |
Medians and interquartile range are listed.
*
Nasal congestion, runny nose, or sneezing without having a cold.