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Respiratory morbidity of the leather tanners and controls
| Respiratory morbidity | Controls (n = 117) (N, %) | Exposed (n = 197) (N, %) |
| Chronic bronchitis | 1 0.85 | 4 2.03 |
| Occupational asthma | – | 10 5.07 |
| Allergic bronchitis | – | 7 3.55 |
| Sinusitis | 2 1.7 | 7 3.55 |
| Pulmonary tuberculosis | 1 0.85 | 5 2.53 |
| Overall | 4 3.41 | 33 16.7 |
