| Table 6: Frequency (%) of respiratory disease patterns observed among the exposed and unexposed groups | ||||
| Spirometry patterns | Exposed group (n=60) | Unexposed group (n=45) | ||
| SMAW* (n=17) | GMAW† (n=21) | FCAW‡ (n=22) | ||
| Normal | 10 (59) | 9 (43) | 18 (82) | 44 (98) |
| Obstructive | 4 (24) | 5 (24) | 3 (14) | 1 (2) |
| Restrictive | 2 (12) | 3 (14) | 1 (5) | 0 (0) |
| Mixed | 1 (6) | 4 (19) | 0 (0) | 0 (0) |
| *Shielded metal arc welding; †Gas metal arc welding; ‡Flux cored arc welding | ||||
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